Yes I am familiar with Unitarian principles and practices, Disillusioned JW. I am a Unitarian. What surprises me is that their tolerance doesn’t extend to conservative groups as well. Or at least it extends to some groups but not to others - they give traditional Muslims/Hindus/Sikhs a lot more slack than traditional Christians. Tolerance of intolerance does involve internal tension, but there are thoughtful individuals, among Unitarians too, who attempt to strike a balance.
This video captures the vibe of a certain strand of Unitarian Universalism embracing everything except the Bible: