Question: Which causes did Yuri Kochiyama advocate that promoted this subcategory of black nationalism, stemming from the idea of racial solidarity?

Context paragraphs:
Szeged Idea: The Szeged Idea (A szegedi gondolat) also informally known as Szeged fascism refers to the proto-fascist ideology that developed among anti-communist counter-revolutionaries in Szeged, Hungary in 1919 and which later developed into a fascist and national socialist ideology.  The Szeged Idea was based upon the claim that Hungary was stabbed in the back in World War I by communists and Jews and promoted action to undo this evil by declaring holy war against such traitors.  Szeged militants promoted Hungarian nationalism, an economic "third way", and advocated a "strong" state.  Szegedists promoted irredentist claims to territories belonging to Hungary prior to the end of World War I.  The ideology claimed the existence of a "Judeo-Bolshevik" conspiracy in Hungary.  The principal leader of the Szegedists was Gyula Gömbös.  Gömbös declared violence to be "an acceptable means of statecraft...to shape the course of history, not in the interest of a narrow clique, but of an entire nation".  Upon being appointed Prime Minister, Gömbös adopted fascist and national socialist positions, including the promotion of corporatist solutions to national unity like that of Benito Mussolini and racial policy like that of Adolf Hitler.  Gömbös declared that his government would "secure our national civilization based upon our own special racial peculiarities and upon Christian moral principles".

Richard S. Fraser: Richard S. Fraser (30 June 1913 – 27 November 1988) was an American Trotskyist and the principal theoretician of the doctrine of revolutionary integrationism in the 1950s within the Socialist Workers Party (US), against George Breitman's advocacy of support for black nationalism.  He joined the Trotskyist movement in 1934, and was a founding member of the Socialist Workers Party (SWP) in the US.  He made a study of the black question in the late 1940s, after the Party began to lose hundreds of black recruits.  This was due not only to the rise of McCarthyist repression of the SWP, but also, of the party's burgeoning opportunism on the question of black nationalism.  Informally, the leadership had even begun discouraging white and black members from forming interracial couples.

White power music: White power music is music that promotes white nationalism.  It encompasses various music styles, including rock, country, experimental music, amateur rap and folk.  Ethnomusicologist Benjamin R. Teitelbaum argues that white power music "can be defined by lyrics that demonize variously conceived non-whites and advocate racial pride and solidarity.  Most often, however, insiders conceptualized white power music as the combination of those themes with pounding rhythms and a charging punk or metal-based accompaniment."  Genres include Nazi punk, Rock Against Communism, and National Socialist black metal.

Black separatism: Black separatism is a separatist political movement that seeks separate economic and cultural development for those of African descent in societies, particularly in the United States.  Black separatism is a subcategory of black nationalism, stemming from the idea of racial solidarity, and implies that blacks should organize themselves on the basis of their common experience of oppression as a result of their blackness, culture, and African heritage.  Black separatism in its purest form, as a subcategory of black nationalism, asserts that blacks and whites ideally should form two independent nations.  Black separatists also often seek their original cultural homeland.  Black separatists generally think that black people are hindered in their advancement in a society dominated by a white majority.

Iraqi nationalism: Iraqi nationalism is the nationalism that asserts that Iraqis are a nation and promotes the cultural unity of Iraqis.  Iraqi nationalism involves the recognition of an Iraqi identity stemming from ancient Mesopotamia including its civilization of Babylonia and Assyria.  Iraqi nationalism in history was influential in Iraq's movement to independence from Ottoman and British occupation.  Iraqi nationalism was an important aspect in the 1920 Revolution against British occupation, and the 1958 Revolution against the British-installed Hashemite monarchy.

Marcus Garvey: Marcus Mosiah Garvey Jr., ONH (17 August 188710 June 1940), was a proponent of Black nationalism in Jamaica and especially the United States.  He was a leader of a mass movement called Pan-Africanism and he founded the Universal Negro Improvement Association and African Communities League (UNIA-ACL).  He also founded the Black Star Line, a shipping and passenger line which promoted the return of the African diaspora to their ancestral lands.  Although most American Black leaders condemned his methods and his support for racial segregation, Garvey attracted a large following.  The Black Star Line went bankrupt and Garvey was imprisoned for mail fraud in the selling of its stock.  His movement then rapidly collapsed.

Yuri Kochiyama: Yuri Kochiyama (河内山 百合子 , Kōchiyama Yuriko , May 19, 1921 – June 1, 2014) was an American activist.  Influenced by her Japanese American family's internment and her association with Malcolm X, she advocated for many causes, including Black separatism, the anti-war movement, Maoist revolution, reparations for Japanese-American internees, and the rights of people imprisoned by the U.S. government for violent offenses whom she considered to be "political prisoners".  On May 19, 2016, she was featured on the U.S. Google Doodle, sparking controversy over her past statements expressing admiration for figures such as Osama bin Laden.

National Afro-American League: The National Afro-American League was formed on January 25, 1890, by Timothy Thomas Fortune.  Preceding the foundation of the National Association for the Advancement of Colored People (NAACP), the organization dedicated itself to racial solidarity and self-help.  The organization became defunct in 1893 due to lack of support and funding.

Jail solidarity: Jail solidarity is unity of purpose of those incarcerated or imprisoned.  In some mass arrest situations, the activists decide to use solidarity tactics to secure the same plea bargain for everyone.  Sometimes activists also make a mutual decision to reject offered plea bargains and take their cases to trial in order to overburden the court system, or in order to otherwise mutually support one another as co-defendants; an example of this would be the Camden 28.  It is generally agreed that jail solidarity works best when a plan is arranged ahead of time.  One of the governing principles of the anti-nuclear movement in the United States was jail solidarity.  Some activists have viewed jail solidarity as being very important for their states of mind while imprisoned.  Jail solidarity can also refer to non-prisoners holding rallies outside prisons or otherwise helping to provide moral support to prisoners, especially imprisoned activists or colleagues.  It has been hypothesized that prison administrations throughout the United States might be overwhelmed by prisoner organizing across racial lines.  Per Herngren, recounting his prison experience, writes:

Pan-Celticism: Pan-Celticism or Celtic nationalism is a political, social and cultural movement advocating solidarity and cooperation between Celtic nations (both the Gaelic and Brythonic branches) and the modern Celts in North-Western Europe.  Some pan-Celtic organisations advocate the Celtic nations seceding from the United Kingdom and France and forming their own separate federal state together, while others simply advocate very close cooperation between independent sovereign Celtic nations, in the form of Irish nationalism, Scottish nationalism, Welsh nationalism, Breton nationalism, Cornish nationalism and Manx nationalism.

Supporting paragraphs: Yuri Kochiyama Black separatism
Answer: Black separatism