(They're Not Like Us, Guilt by Association, Honor by Association, a variety of the Ad Hominem and Hasty Generalization)
This fallacy occurs when someone’s argument or position is dismissed (or upheld) because of the group to which that person belongs. Often referred to as the “They’re Not Like Us” fallacy, this is the basis for bigotry and racism. It’s a type of Ad Hominem Fallacy (as it dismisses the argument based on the individual making it), a Red Herring (as it is a distraction from the actual issue), and a Hasty Generalization (as it uses implied stereotypes), and it can often be an Appeal to Emotion (as the stereotypes often invoke an emotional response as means to dismiss the position).
