The "white hats" have know for more that half a century and did nothing.
From 1969.
"In 1943 the following directive was issued from party headquarters to all communists in the US. It read when certain obstructionists become too irritating label them, after suitable buildup, as fascists or Nazi or anti-semitic and use the prestige of anti-fascist and tolerance organizations to discredit them in the public mind. Constantly associate those who oppose us with those names which already have a bad smell. The association will, after enough repetition, become fact in the public mind."