Valor envy
The yearning for a noble cause to fight for, resulting from growing up in a generation spoiled by first-world luxuries, and thus filling the absence of real existential threats and social injustices with imagined ones, typically naming them after history's most notorious evils, racism and Nazism, and desperately trying to identify oneself with the same righteousness as those who fought actual evil.
Antifa hooligans like to pretend they're revolutionaries, but really they're just spoiled brats with valor envy.