It is often not racism or chauvinism or 'constructive' criticism.
It is mostly people with low to no emotional intelligence or simply broken in some way, like narcissism, sociopathy, etc. that produce a lot of these vile comments.
Like bullies and gas-lighters at school.
Simply unaware of the lasting effects of their words on normal people.
Some people are contrarians, others incapable of compliments or empathy, others just farming social media algorithms with rage bait.
Such folks have no idea that they are rarely celebrated, or truly loved by those closest to them, because they have to be tolerated and managed. They are hard work to love.
Most people breath a sigh of relief when they leave the room.
It is not natural to not care about your impact on people.
It is a mental deficiency, a mental illness, something that often needs counselling or medication.
In medieval times, you would physically go to war with such people, enter duels, throw them into institutions, start revolutions, but here we are on social media, just using a block button.
ezpz
Aint technological progress grand?