Ad hominem
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https://en.wikipedia.org/wiki/Ad_hominem
Paul Graham's Hierarchy of Disagreement lists ad hominem as the second lowest type of argument in a disagreement.
Ad hominem (Latin for "to the person"),
short for argumentum ad hominem, is a fallacious argumentative strategy whereby genuine discussion of the topic at hand is avoided by instead attacking the character, motive, or other attribute of the person making the argument, or persons associated with the argument, rather than attacking the substance of the argument itself.
See also: List of fallacies
Tu quoque[edit]
Main article: Tu quoque
Ad hominem tu quoque (literally: "You also") refers to a claim that the source making the argument has spoken or acted in a way inconsistent with the argument. In particular, if Source A criticizes the actions of Source B, a tu quoque response is that Source A has acted in the same way. This argument is invalid because it does not disprove the premise; if the premise is true then Source A may be a hypocrite, but this does not make the statement less credible from a logical perspective. Indeed, Source A may be in a position to provide personal testimony to support the argument.
