Antifa

The name Antifa is made up of the words anti and fa “abbreviation of fascism” and thus the meaning of “anti-fascism”

At first, the movement may seem to be merely an opposition political activity, but in fact it is categorized as a violent leftist movement.

What is the antifa

simply its Anti-fascism and it used to be ideology that is opposition to fascist ideologies, groups and individuals. The anti-fascist movement began in a few European countries in the 1920s, and eventually spread to other countries around the world. It was at its most significant shortly before and during World War II,

History of this ideology

It starts with nationalism of the left in Italy and  it developed in those nations threatened by Italian irredentism (Balkans, Albania)

Ok.... what about what is going on now in the antifa supporting hits?

Because of Attacks on public property extended the same day to hit one of Trump's most famous right-wing supporters, Richard Spencer The famous supporter of Trump, who was holding a news briefing in the street when Antifa supporters punched him without warning and punched him in the face claiming that he was a new-Nazi.