I don’t know what any one of them believes as it pertains to the trinity or in what place they put Jesus in their lives. Nor do I care, I would suppose, as I have never had serious conversation with any of them that I know of. I will deal with them as God puts them in my path but so far He has not.
I have (shudder) had them more than cross my path. I had a Campbellite try to convert me in order to save my soul not only from the Catholic Church, but the Knights of Columbus (this from a dude who changed churches more often than I change my razor blade). I had a JW try to convince me to the extent that he even lent me his JW Bible. I not only found it interesting at the translational differences both in words and in apparent meaning, but also in the phrases that he had underlined in pen.
If you come into close quarters with one of these, dude, gird your soul very carefully in the Grace of God and in the teachings of Jesus. You may wonder at times where I come from? I know some of these folks all too well...
It’s interesting to watch different people who get called to deal with different issues. Like I said I have never had to deal with any of those. The two I had to face early on already and pretty consistently throughout my life is evolution and paganism.