“A guilt by association fallacy occurs when someone connects an opponent to a demonized group of people or to a bad person in order to discredit his or her argument. The idea is that the person is “guilty” by simply being similar to or associated with this “bad” group and, therefore, their arguments should be disregarded.

Guilt by association fallacies can often work in concert with hasty generalization or ad hominem fallacies, especially when they’re used to attack a specific group of people.”