That's not my problem.

That is your problem, because it's what led you to take a gratuitous shot at all the people who post here, based on a complete lack of understanding of their position. And what led you to make a lengthy post that again completely misunderstands the point. Which is why you wrote, falsely,

Unlike most of this board, which claims that Antifa isn't a thing.

The board doesn't claim Antifa isn't a thing. It claims that Antifa isn't an organization - which is true. It's like environmentalism. Environmentalism isn't an organization. There are organizations that promote environmentalism, but environmentalism isn't an organization.

If you genuinely are here to find out what liberals believe, that's a place to start. Liberals do not believe Antifa doesn't exist, any more than you would believe that environmentalism doesn't exist. We believe it is not an organization that can be placed on a terrorism watchlist (or attacked with any other tools that apply to organizations and not belief systems), any more than you could place environmentalism on a terrorism watchlist.