Across my life I have encountered this numerous times. One recemtrecent example from SE:
If you don't think those are a crime, you are not adult enough or logical enough to have a conversation with me.
While this clearly includes ad hominem on fictional (or subjective at least subjective) grounds, I'm asking about the first part of it, which pressuposespresupposes that I'm too young or lacking logic only because I disagree with them. How
What is this trick called?