There are tensions in parts of U. S. society that are on the liberal religious or skeptical end of the scale. There always has been some of this.
I’ve attended and spoken at several Unitarian Universalist churches. Each had a different personality. Some I could see myself joining, others less likely.
One of the dilemmas of UU is the role of spirituality. According to the attached, the denomination had its roots in a past when across the country there were fights over religious dogma. The UU (or its predecessors) found a nitch in having a church where all of these concepts of Christianity were welcome.
As time went on, Humanist roots took hold. That is, the concept that humans are a source of good and can be thus be relied upon to work out society’s problems and rules of conduct.
Then, the view that UU should be inclusive of other explanations in addition to humanism returned. Thus, the nitch of UU was to not be judgemental about most spiritual or nonspiritual views.
Now, the growing popularity of rationalism in the form of Humanism is again challenging the UU. To embrace many varieties of spiritualism is contrary to the core of Humanism. Thus, not only individual congregations, but the denomination as a whole is debating whether to go the direction of identifying as spiritally open or enthusiastically rational.
In spite of this unresolved direction, the Unitarian Universalist church is doing well.