I just wrote a hub explaining how I became a UU and describing the ideology in some detail. (I would put the link here but it might cross the line for self-promotion.) UU churches vary, but they are as liberal and accepting as you are likely to find, namely because there is no theological creed that is being pushed. The emphasis is on proper behavior, not proper theology. There are some liberal Christian churches that may be similar, but a UU church does not hold Christian teachings above those of other religions. We believe that you should try to learn from as many traditions as possible, and if beliefs lead to positive behavior, then they are a good thing.