In 1981 there was an outburst of Albanian nationalism. Prishtina university became a centre for some nationalistically orientated students that generated Kosovar Albanian protests (1981) over social grievances that marked the first large-scale expression of nationalism in Yugoslavia since the Croatian Spring (1971). Kosovar Albanian communists condemned the protests and supported Yugoslav unity while leading the campaign against Albanian nationalism and in that sense shared the view of other Yugoslav communists. The unification of Albanians in the Balkans into one state was also a feature of Kosovar Albanian nationalism and these views were confined to dissident and underground groups. Within the context of the 1981 protests these groups, many with left-wing political orientations united to form the "People's Movement of Kosovo" (LPRK) in Germany (1982). Unification of Albanians into one state was a demand viewed as separatism and irredentism in Yugoslavia which was banned. Kosovar Albanian nationalists were divided into groups with one that wanted to focus on the Albanian question as a whole and the other mainly focusing on Kosovo. Political dissent by Kosovar Albanians followed resulting in imprisonment and comprising the majority of political prisoners during the 1970s and 1980s. The high birthrate in Kosovo was viewed by Albanians as a way of achieving a "pure Kosovo" by outnumbering local Serbs while communist politicians held the view that Albanian irredentists were attempting to rid Kosovo of Serbs. In the 1970s and 1980s, sentiments of Albanian nationalism had spread from Kosovo to North Macedonia worrying Macedonian communist authorities which resulted in measures of state sociopolitical control over Albanian cultural and linguistic affairs suppressing expressions of Albanian nationalism in a campaign referred to as "differentiation".