Question: Who made the term popularised that is the nationalism of Suhaldev? 

Context paragraphs:
Suhaldev: Suhaldev is a semi-legendary Indian king from Shravasti, who is said to have defeated and killed the Ghaznavid general Ghazi Saiyyad Salar Masud in the early 11th century.  He is mentioned in "Mirat-i-Masudi", a 17th-century Persian-language historical romance.  Since the 20th century, various Hindu nationalist groups have characterized him as a Hindu king who defeated a Muslim invader.

Pan-European nationalism: Pan-European nationalism is a political term, apparently coined by Hannah Arendt in 1954 for a (hypothetical, or postulated) ideology of nationalism based on a pan-European identity.  Arendt warned that a "pan-European nationalism" might arise from the cultivation of anti-American sentiment in Europe.

Card-carrying Communist: "Card-carrying communist" is a term popularised during the Second Red Scare as a label for members of communist and far-left organisations, especially the US Communist Party.  The term is still considered derogatory when used in its Cold War context.

Slovenian nationalism: Slovenian nationalism is the nationalism that asserts that Slovenes are a nation and promotes the cultural unity of Slovenes.  Slovenian nationalism first arose in response to the influx of ideas of nationalism from the French Revolution that arrived in Slovenia when the French forces of Napoleon Bonaparte made Slovenia part of the Illyrian Provinces from 1809 to 1813.  Slovenian nationalists such as Anton Korošec endorsed Yugoslav unification during World War I as a means to free Slovenia from Austro-Hungarian rule.

Ampallang: The palang (crossbar in Iban), better known in the West as ampallang in the term popularised by Doug Malloy, is a male genital piercing that penetrates horizontally through the entire glans of the penis.

Putinisation: Putinisation is a term popularised by Martin Schulz, President of the European Parliament which has been used to describe a perceived movement away from liberal democracy in certain Eastern European countries in imitation of the regime of Vladimir Putin in Russia.

Hindutva: Hindutva ("Hinduness"), a term popularised by Vinayak Damodar Savarkar in 1923, is the predominant form of Hindu nationalism in India.  The Bharatiya Janata Party (BJP) adopted it as its official ideology in 1989.  It is championed by the Hindu nationalist volunteer organisation Rashtriya Swayamsevak Sangh (RSS) and its affiliate organisations, notably the Vishva Hindu Parishad.

Neophile: Neophile or Neophiliac, a term popularised by cult writer Robert Anton Wilson, is a personality type characterized by a strong affinity for novelty.  The term was used earlier by Christopher Booker in his book The Neophiliacs (1969), and by J. D. Salinger in his short story Hapworth 16, 1924 (1965).

Methodological nationalism: In Social Science, Methodological Nationalism is a term used to describe an intellectual orientation and pattern in scholarly research that conceives of the nation-state as the sole unit of analysis or as a container for social processes.  This term has been greatly developed by Andreas Wimmer and Nina Glick Schiller, who specifically define methodological nationalism as "understood as the assumption that the nation/state/society is the natural social and political form of the modern world".  Methodological Nationalism has been identified in many social science subfields, such as anthropology, sociology, and the interdisciplinary field of migration studies.  Methodological Nationalism, as a practice within Social Science, has been further critiqued by scholars such as Saskia Sassen, who contends that the nation-state and its borders are an insufficient unit of analysis and that the national is at times the "terrains of the global".

Neo-noir: Neo-noir is a modern or contemporary motion picture rendition of "film noir".  The term "film noir" (a term popularised by two French critics, namely, and Etienne Chaumeton in 1955), when translated from French to English, reads "dark movie", indicating a sense of something sinister and shadowy.  The film-noir genre includes stylish Hollywood crime dramas, neo-noir being the same, but with updated themes, content, style, visual elements or media that were absent in the films of the "film noir" period from the 1940s and 1950s.

Supporting paragraphs: Suhaldev Hindutva
Answer: Vinayak Damodar Savarkar