FIST (Fight Imperialism, Stand Together) is another bunch of commies, who are, in their own words:
"... a group of young activists who fight the racism, sexism, LGBT oppression, and working class exploitation that are the results of imperialism and capitalism. We believe that the only way to achieve true liberation for all peoples throughout the world is through socialism."

There are four things you can never have enough of at an anti-war march: megaphones, drums, coffins, and commies.