groups of people who oppose fascism (= a political system based on a very powerful leader, state control, and being extremely proud of country and race, and in which political opposition is not allowed), and who show this using protests and sometimes violence

He was involved with Antifa for almost 30 years. 他参加反法西斯群体已经快30年了。

She is sympathetic to Antifa's goal of silencing racist extremists. 反法西斯群体的目标是让极端种族主义者闭嘴，她对此倾于赞同。