Now that it seems that Unitarian Universalist Christians are almost free of its culture of learned defensiveness, it seems time to point out one of the key fallacies that anti-Christians use to cow us.
The accusation goes something like: "Unitarian Universalists aren't Christian, so you can't really be a true Unitarian Universalist." A variation is that Unitarians and Universalist "outgrew" Christianity, casting us as atavistic.
Logically, we know it doesn't hold water, but until now I didn't have a concept with which to point this out.
Then came the Wikipedia article on the "no true Scotsman" fallacy. Read and enjoy.