Is there any good Christian forum online?

You'll find some good ones on Facebook, where you can find one which suits you best, but here, you'll find Christians are bashed by some and accused of pushing their beliefs and even put words in their mouth, they didn't say. Very hateful remarks that lately seems to be the agenda of a certain group here, to target and turn people against Christians here, particularly. I'm sure you know how that goes. You also have to be careful which Christian "brethren" you come across. There are some you'd swear were genuine, but you find out later, they're not Christians at all, and give the genuine ones, wrongly, a bad name. Those the Lord warned about. I wish you the best. God bless you in your Christian walk.

I have two that i frequent..

christianchat.com Which is a chat room and a froum combined..

And

worthychristianforums.com which is a forum with a chat room attatched.. though the chat room is rarely busy..

There are some on Facebook

Unitarian Universalists are good at diversity while still being Christian. Although you find Christians that will argue only their denomination is true, their church is true, their family is true, only they are true, etc...

It's hard to find forums with diverse thought. Most seem intent on preaching their own set beliefs.

You gotta be careful. I once stumbled in on one that turned out to be white supremacist or nationalist or something. I was also on one for a while that turned out to be very poorly run. It's a shame--that's where I met my wife