Ad hominem, short for argumentum ad hominem ('argument directed at the person'), is a rhetorical tactic of attacking the character, motive, or some other attribute of the person making an argument rather than the substance of the argument itself.
This avoids genuine debate by creating a diversion often using a totally irrelevant, but often highly charged attribute of the opponent's character or background.
Wait to you hear people claiming that Russia is invading Ukraine! Why would Russia murder women and children? Definitely psychosis!
Right? Clearly it was Israel.