Interesting that you did not name a single level he was wrong on.
please go into detail.
I am making general reference to what people of today mistake for polital discourse: Foul and abusive language. The author did not qualify how to push back, except to scoff at taking the higher ground. I am assuming that taking the lower ground like our adversaries includes the abusive behaviour. That implication seem clear to me.
I take issue with abusive and insulting discourse.