I agree that uncivil comments are down-voted more often, but there is clear "I don't agree with you even though you've made your point intelligently, so I will

I agree that uncivil comments are down-voted more often, but there is clear "I don't agree with you even though you've made your point intelligently, so I will see if I can make it disappear" which is really unfortunate and not conducive to civil discourse. Perhaps less than other platforms but certainly a thing - often with no counter comment to explain. All seems a bit small-minded.