That seems right though "10% toxic". It's not "10% offensive". It's a judgement as to how likely to inhibit further rational discussion. Presenting as malodourous a slight as you like in well laid out language and with clear thought _is_ less likely to be "toxic" - people can respond, it's when you get back and forth ad-hominems that the conversation has ceased being functional beyond catharsis and "conflict entertainment".

Edit: Oh yeah, and your direct maternal ancestor has a suffusion of scent akin to the fruiting of the Sambucus plant!