Senator Joseph McCarthy was a complete moron who wouldn't have been able to spot a Communist on May Day in Red Square if one had walked up to him waving a red flag and handed him the Little Red Book of Quotations from Chairman Mao.

The fact that a few of the people he and his committee destroyed had sold secrets to the Soviet Union gives testimony to the Texas maxim "If you go spraying buckshot around, you're liable to hit something". Far, far more innocent people were destroyed.