I'd lay money that it was Das Berniejugend brownshirts bullying MAGA kids.
Die Berniejugend
The fact that there is not a single documented case of people wearing MAGA hats doing violence against Antifa style leftists but there are numerous cases of Antifa style leftists doing violence against people wearing MAGA hats and attending Trump rallies?
Don't let the facts deceive you, just believe what the mediabots tell you.