Matthew writes in the comments on the "Democratic Party" post.
We attract people not so much through theology, but through cultural and political identification. As one UU minister of my acquaintance is fond of saying, "Why would a Republican *want* to be a UU?" Unfortunately, he has a point. When we eschew religious depth for a kind of tribal us-and-them cultural and political identity, we lose the elements of religion that transcend partisan politics.
For the record, CC in real life is not nearly such a firebrand as she is in writing. She's actually a bit shy around people she doesn't know well and when she hears people on Sunday morning insulting Republicans as a group, misstating facts, and in general doing the sorts of things she would jump on you for here, she just stands there uncomfortably for a moment, then silently creeps away. She actually talked to a minister once about some political things the minister had said from the pulpit that basically oversimplified something. The minister was sweet and apologetic about it, but CC was still very embarassed and probably won't repeat the trick.
My big concern is political things UUs do as a church and in worship. If you personally want to insult Republicans as a group, that's your business. But we've probably lost some good members to moments like some I've experienced.
who for whatever reason has defended Christianity to near-strangers, but can't quite do that for Republicans, perhaps because she has been a Christian but never been a Republican.