Maybe it's time to give up trying to change William's behavior, since Dave isn't going to.
Another thread that accomplished nothing
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=517422

"The mere thought that you think I need prayers from someone so deceptive makes me feel dirty." is a parapraxis; an inadvertent revelation of the real problem. He is a damaged soul, not healthy, and not going to change until things get so bad in his life that he if forced to. He has got to be miserable.
Prayed for him already this Lord's day. Those that do might want to join me and give it a rest. As I said, it's hard to be angry at someone you are praying for, even while disgusted at the behavior.
Confronting cowardly bullies on the internet is a waste of time - save the emotional energy for real life...which this ain't.