White supremacism is a discriminatory ideology.
He takes the position of art for art's sake.
至上 means 'supreme' or 'paramount' and is used in compounds like 至上命令 (supreme command). 至上主義 adds the sense of an -ism or principle.
profit-first principle; supremacy of self-interest; irresponsible capitalism
love for love's sake; the principle that love is supreme
ethnic supremacy; racial supremacism
white supremacy; white supremacism
libertarianism
art for art's sake
Compound of 至上 (supreme, paramount) and 主義 (principle, -ism). The exact historical derivation is uncertain, but the word follows a common pattern for forming -ism terms in modern Japanese.