It was Phil Ochs who said that liberals are 10 degrees left of center in good times but 10 degrees right of center when it affects them personally.
When you mix liberalism and scientism in the way that Unitarian Universalists often do, this can easily lead to to an odd competition to appear more moderate or more reasonable, independent of the actual issue at hand.
In lifestyle issues, this is particularly troublesome. You meet vegetarians who want to prove to you that they are reasonable and not as extreme as vegans. You meet protestors who want to prove that they are the good ones unlike so-called anarchists. For UUs it is often, we are religious but not like that.
In coarse language, I would like to ask: who do you shit on to prove you are not a freak? So many of my UU friends struggle so hard between being so middle of the road, middle class and middle America and the knowledge that they are also on the fringe of maintream American culture.
A lot of the time, people pick on groups that overlap with my community such as vegetarians, hippies, militant breast feeders, union members, anarchists, Buddhists, or any other group that can serve as sufficiently beyond the pale. It is even more fun when it happens within a group (such as when pre-consolidation Unitarians and Universalists used to do this to each other or when Democrats try to do this to left leaning members of their own party)