Trump and the Proud Boys: Who are the Proud Boys? Are they a bunch of gays? Or what?

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I have noticed some articles about the Proud Boys. I’ve never looked into them, having heard from others that they’re a bunch of gays. If anyone has any insight into them, I’m interested.

I was quite surprised during the debate when Trump mentioned them. They seem to be a big movement, but strangely, in "our movement" I’ve not come across anyone who was involved with them, knew of them, or looked up to them.