A sure sign of a Communist is that they will not allow the other side to even present their argument.
“Liberals claim to want to give a hearing to other views, but then are shocked and offended to discover that there are other views.”
― William F. Buckley
For leftists anyone who disagrees is a Nazi and holocaust denier.
That ends the conversation in a hurry.
(Oh wait—there are some Freepers that use the same tactic.)