Ah yes, the hijab attacks... should we go through the list for the last two years. Pick out the ones that turned out to be fake, or just leave it alone?
The incidents at Trumps rallies, I'd hazard a guess that a good number of those came from counter protestors that had snuck in and caused trouble?
Small numbers? Maybe. Though given the nature of it all and the way the media has been running, such information wouldn't be readily available, or just glossed over. This is the same media mind you, that for some reason decided to falsely represent the Covington Kids story and even omitted the presence of the Black Israelites, shouting all sorts of racist profanity at the students.
I'm also going to have to say that I don't even think many on the left actually think they are supporting hate, or violence against innocent people. They've spent the last three years trying to sell the notion that these people who support Trump. Are racist, homophobic, Nazi, fascist.. etc, etc.
Besides, going all the way back to when Richard Spencer was punched on the sidewalk. You can find no end of the people praising the attacker and saying that more should be attacked as such. It just depends where you look and what you're willing to take as a source sample for society at this point.