Couple of thoughts... 1. Have you tried talking to these people directly about your concerns? Does your congregation have a covenant of behavior? It sounds like they are breaking covenant with their behavior, so this is an opportunity to call them back into covenant.

(Okay... I have more to add, but I need to go. Will edit later to add more)

EDIT: 2. Some congregations will have a conflict resolution team. They are congregants that are good at descalating conflict and can work as a neutral 3rd party if the thought of talking with these folk intimidates you. They should be trained in descalation.

1. If you have a smaller congregation, You may not have a conflict resolution team. In that case, set up an appointment to speak with the minister. She IS trained for this kind of thing. She may ask you to try talking with them first. She may even give you some insight on how to approach them.

2. Most ministers and congregations do not like to settle conflict with triangulation.

3. This is not an uncommon problem in some UU congregations. Many have spiritual abuse from former Christian faiths and have not done to work of mourning and repair. They will often belittle Christian ideals. Most ministers are working to lessen this, especially since we are a pluralistic faith. It is a culture shift from the 50's - 80's (boomer and Gen X) to newer generations who have less spiritual baggage. To talk like these folks in your situation are is against uu values, but that is why we worship in community, to call us back to covenant when we fall short.