Re: Anger on the mat
Aikido pushes buttons, and clearly it is pushing his. But you are not his punching bag and I would not stay in a dojo that tolerated one student abusing another.
Yes, it is abuse. "Martial edge" is NOT about reacting with rage and injuring others.
(And anyhow, why should demo ukes be tanking for him anyhow ?! How martial is THAT?)