Why the need to explain or convince people regarding the concept of the Trinity? Is it that you cannot let go of that Watchtower habit to proselytize others? You know every time you do that, the JWs win.
People here don't need to be convinced of the Trinity or God or religion. It's one thing to defend yourself when someone insults you or tries to hurt you for no reason.
But to go out of your way to tell us, ex-JWs, that you can convincingly explain new doctrine to us in an evangelizing manner--well, that is where most of us haven't much tolerance.
Notice I didn't say we react with malice. I mean intolerance like one gets nauseated at seeing food that once made him or her very ill. They can't stomach it.
If you're an ex-JW who has found mainstream Christianity as something that works for you, most of us (if not all) are supporting you as someone who has successfully left the Watchtower behind. Yea for you!
But we're not your new subjects to proselytize. You can use your knowledge of things like the Trinity to disprove how the Watchtower is ignorant of what it teaches, but it's really far from "Emily Post" to preach and try to convert your fellow ex-Witnesses here on this forum.
Especially do our atheist neighbors on the forum need our support. More than others, they get treated as non-members of society, usually cannot speak up for what they don't believe in while in public, and have little respect from Christians (who oddly preach 'love they neighbor'). So if you're gonna mention religion, best to leave your opinions at the door and stick to academic critical analysis.
While no one's saying you should accept and not call out hate speech if you ever encounter it (which is really rare here), you can talk about religion if it's used to counter Watchtower teaching. But leave making disciples of others here out.
Otherwise you can talk about the Trinity each time you are on the board as long as it's useful in that particular manner. Support each person where there are, help us see where we still got the Watchtower monkey on our backs, and defend us where we stand when some creepy Witness apologist comes on here to attack us. Then you'll do fine.