How does an abusive ad hominem argument attack a speaker instead of an argument?

An abusive ad hominem is a specific type of ad hominem argument that functions by directly attacking the person presenting a claim rather than engaging with the substance of their argument.

In this form of fallacy, the speaker attempts to discredit or reject an opponent's position by labeling the individual as dishonest, immoral, or otherwise compromised. By focusing on these personal traits, the attacker seeks to persuade an audience to dismiss the argument without ever addressing the underlying facts or logical reasoning provided by the speaker.1

Ethically, this approach is problematic because it relies on irrelevance; unless a person's character is directly related to the truthfulness of their claim, attacking them is an attempt to manipulate perception rather than seek the truth. While logic prioritizes the validity of statements, abusive ad hominem attacks prioritize rhetoric and persuasion, often tarnishing a person's reputation to avoid the necessity of responding to their actual contentions.1