Antifa does not oppose "groups that promote violence based on demographic factors". They oppose, violently, any group that isn't them.
Just last week, because of Antifa Berkeley had to spend 600K on security to protect an event with Ben Shapiro. A centre-right Orthodox Jew who's married to someone who isn't white. Someone who left Breitbart for its alt-right connections and routinely denounces the alt-right. In fact, Antifa has a strange habit of protesting, violently, Jews.
Antifa will routinely crash free speech rallies and assault people in mass (even when the organizers denounce white supremacists and have anti-white nationalists signs).
I appreciate your crusade to somehow make Antifa JUST AS BAD as white supremacists. When you are trying to whitewash (no pun intended) some pretty slimy people like neo-nazis, it's really the only possible play to distract from their stances. Like, I think trashing a Starbucks sucks, but I think wanting to put people in gas chambers because they are Jewish is several orders of magnitude worse. But that's just me. Now, you can point to the prettier members of the alt-lite who are ostensibly into free speech, just like I can point to the prettier members of Antifa who protected clergy from the violence of white supremacists. However, on a crime-for-crime basis, white supremacists are ahead by a long shot. And, on shittiness of ideology, white supremacists are also winning.
But even if you were to convince anyone that Antifa=neo-nazis, your argument is going to fall short because there isn't any evidence that Hillary is aligned with them to any level approaching Trump's coziness with white supremacists. It's not clear that Antifa members voted for Hillary, campaigned for Hillary, or supported Hillary in any significant way. Antifa protests aren't hotbeds of I'mWithHer tshirts. Compare and contrast with Charlottesville, where a bunch of white supremacists wore Trump tshirts, talked about how they loved Trump, etc. Stormfront message boards are love fests for Trump.
From the other side, Hillary hasn't praised Antifa, said some of them are fine people, etc. None of her advisers are cozy with Antifa. But-hey-look over there! Why, it's Stephen Miller. Old friend and roommate of nazi dirtbag Richard Spencer. So, a senior Trump adviser is tight with a nazi. Trump himself plays footsie with them.
SO, once again, this isn't the better timeline. If Hillary were president, she wouldn't be chuckling about "Antifa will be antifa!" from her pizza sex dungeon. We have a president who panders to white supremacists. That sucks. You can't WHATABOUTHILLARY!! that away.