Same way I feel towards any group that preaches peace and love. They’re hypocrites. They always have some prejudice towards someone or some group.
Besides, I don’t know how there can really be Unitarianism. It seems like the idea is to combine all religions. Trust me. That’s not going to work. You may be able to mesh religions or spiritual beliefs of a certain category (Abrahamic or oriental for example), but it usually comes to one religion dominating the rest and simply pretending to be united.