If you disagree, attack the argument - not the individual. A sensible policy. Not taking things personally is sound advice but visceral reactions are just that - it's the reaction caused by taking things personally one wants to avoid ... but that brings us back to the original tenet: attack the argument, not the individual.
Anyhoo, whatever the wording, it's the right intent. Mind you, aside from a few chilli peppers, this crowd seems less fractious than some I've encountered 🙂