you are certainly correct
nevertheless, this is an internet forum
there is a certain psychological milieu unique to this very poor and dangerous form of communication. certain accepted modes of behavior that become almost mandatory for posters.
if you want to have a forum or comments section, the best you will be able to do is delete the most offensive posts (and or posters, ie dovdov). you will not be able to turn an internet forum into a group of people around the dinner table.
one other point
sometimes anti-Torah attitudes must be addressed, sometimes in a strong manner, not necessarily to change anyone but because we are Jews, and Sheker must not be allowed to raise it’s head and speak, without being answered by Emes. even if it DOES create an uproar