The Archie Bunker clip shows a man portrayed as a bigot who regards Walter Cronkite as a Communist. This is a sneaky way of hiding Cronkite's leftist tendencies. Is the fallacy involved called "consider the source"? If Archie is a bigot, he must be wrong when he criticizes someone. We are led to conclude that Cronkite must not even slightly pro-Communist, because whatever a bigot says is always completely false.