It is only polite when gossiping to include the object of your gossip in a flag so they can respond to the lie..not nice X to compare us to nazis
Argue the logic and the scripture, if you can. "Fight like a man, Scriptures in hand," to quote a popular Christian ska-rap group.
If you cannot rebut the arguments, then dont shout louder or more shrilly. Re-evaluate your positions. You could be wrong. I know I was, when I locked horns with the_doc.