I'm supposing he's referring to the public dispute Paul Graham and Michael Church have been having for some time.

There's no such 'dispute'. It's 100% imaginary.

Is this why michaelochurch account hasn't been posting as much lately? I always thought that was the most interesting user that posted here, why push him away?

We banned michaelochurch because of https://news.ycombinator.com/item?id=10017538 after a long history of abusing this site and countless requests to stop. Since then he's made up all kinds of things, such as the comment upthread.

Yes, that idiocy. Of course, Graham himself looks clean because he leans on his attack dogs.