Actually get to know some Unitarians and you might be surprised. Belief isn't political - or shouldn't be.
My late in-laws were Unitarian. I am very familiar with them, used to attend when visiting, read all my MIL's newsletters (which appeared to be ongoing manifestos from the Democratic party)
The congregation was almost all White, middle to Upper class liberals. They did have one nice Black lady, whom they fawned over to no end, plus some members had adopted outside their race. They were totally unrepresented in the lower classes, I noticed.
That's not my experience with them, not by a long shot. But not being a Unitarian myself, I'll leave that to the folks who actually are experts. You might wish you'd had me instead.
Xotoxi can correct me if I'm wrong, but somehow I don't think smearing any one sect or church with political stereotypes and propaganda videos was the point of this thread.