Sorry, but "interracial/gay marriage, abortion, affirmative action, and the election of a non-white president" are not radically leftist positions, those are some of the most baseline milquetoast liberal viewpoints out there. How many democrats and other left leaning politicians have supported things like public ownership of industry, progressive taxation, the abolishment of private property? THOSE are radical leftist ideas; never mind the fact that most democrats (like republicans) are still bought off by big companies to support their interests over the needs of the working class. Never mind still that politicians further to the right are either complicit or actively fighting tooth and nail to undo most of the examples you just mentioned.
"And Antifa are animals. You can claim that's a 'common fascist tactic' all you wish...that doesn't make it so."
Yes it is, the nazis literally referred to jewish people as "rats."
As I said, Antifa first got its bearings in places like Italy and Germany during the early twentieth century, which weren't exactly leftist utopias at that point in time last I checked.