Despite the outward similarities between Unitarian Universalism (UUism) and the Baha’i Faith, the two religious movements have profound differences in actual nature. For this reason, I wrote a book recently explaining the differences:
I have published a BOOK

One chapter of the book dealt directly with what UUs can do if Baha’is interact with them.

1. Be friendly, but reserved. – Most Baha’is are genuinely loving for humanity in general, being ignorant of the actual failings of their own religion….just like the members of most other religious groups in the world.
2. Be willing to work with Baha’is on issues you have in common, but only on YOUR terms. – They are decent allies against racism and for human rights in general. But they will avoid issues regarding gay rights, seeing gays as diseased.
3. Do not confront them about their falsehoods and failings of their religion, unless they actually try to convert you. – Most Baha’is are not emotionally equipped to deal with the totality of the facts regarding why their religion is not suited for most people in the world. However, if a Baha’i does ask specific questions about why you reject the Baha’i Faith, be honest. Do not sugarcoat the truth in such cases.
4. If you attend Baha’i gatherings, NEVER go alone. – Such events known as firesides, Unity Feasts and Baha’i Holy Day celebrations are designed to mainipulate “seekers” into learning more about the Faith, but they are profoundly one sided in their depictions. People who are going through periods of depression or grieving over a loss may find themselves subjected to “love-bombing” by Baha’is.
5. If a Baha’i wants to join a UU church as a “Unitarian Baha’i”, welcome him – Not all Baha’is are loyal to the Universal House of Justice and those that want to think freely should be helped to find a place to do so. UU churches and fellowships are ideal for this.