red-tag
Also known as Reductio ad Stalinum, Reductio ad Marxisum, Reductio ad Chomskynum, Reductio ad Bakunum/Reductio ad Bakuninum, Reductio ad Libertarianum, Reductio ad Leninum, or Red-bait, is a logical fallacy (part of ad hominem) when someone dismiss speaker's argument by accusing them as a leftist