Fascism on the right rises when the left resorts to violence. When the left engage in true discourse and debate, as Martin Luther King did, there is an actual outcome and progress is made. When the left resorts to violence, as Malcolm X did, whilst also shutting down the debate and resorting to slurs, the right retaliates and then some.

You cannot poke the bear and then play the victim. The left refused to engage in debate for decades and instead decided it was better to yell racist at everyone who wanted to discuss immigration policy or foreign policy. The right then did the same and started a backlash using ad hominem attacks and equally dirty tricks (e.g. Milo) and the left got violent in reaction.

When the left get violent and continuously poke the bear, what do you think is going to happen next? Do you think the right are just going to sit back and accept it?

There is a reason the Black Panthers, Black Guerrilla Family, Aryan Brotherhood, etc. were all founded during the 60s. Violence on both sides was given a mandate due to the lack of true discourse at the time. People resorted to it and this caused a lot of issues.

Fortunately, someone on the left, Martin Luther King, realised that the only way to overcome this was to engage in civil discourse on the left and not use violence. It was at that point that progress started being made.