Its not about agreement or disagreement - as @Goldstone1976 said, HS promised not to discuss the subject as a condition of being allowed back after his previous ban.I see nothing in what he said to me as being in the slightest bit offensive. Are we not allowed to discuss people's reactions to opinions they don't like? I have read his comment several times and other than the tone, I pretty much agree with what he has said.
He broke that promise, hence the action taken.