All depends. I’m friends with a number of folks who align themselves that way. Also friends with a number of self proclaimed neos or other similar groups. [that’s the great thing about online: being friends from a distance].
There’s no official antifa organization, even if some claim to be. Anyone can do it. Also, there’s people on the far political right that pretend to be antifa in order to discredit them.
But beyond all that, look at the aims: Fascism vs anti fascism. They’re not the same. No fascism, no antifa. You can have fascism WITHOUT antifa, but you can’t have antifa without fascism.
Rather than looking at antifa for answers look to anarchy groups. There’s plenty on facebook, although with lots of fakes finding a genuine one might take a hit or miss. Poke around. Ask questions. See what you think.
There’s different types of anarchy groups but it’s out of some of the anarchy groups as well as some of the pro socialist and/or pro communist and/or “leftbook” that you’ll find some support for youth rights, perhaps quite a lot. Depends who you find.
They’re not good analogies. Books could almost work but for that you’d have compare something like politics vs anti-politics: in short, too vague, although it is constructed like social movements.
You need better analogies than those. Can’t just substitute nouns and expect that to fly.