I have always seen you express humility and gratitude towards your readers or even when commenting on another’s article, even if you may not agree, you’re capable of having civil back and forth’s with others.
I don’t think comments should be deleted unless they have no substance other than to attack a person in a vile manner, abuse, threaten or troll, as you commented above.
Civility is possible if people can continue to have back and forth conversations. And, many times if others have dissenting views, I find it’s better to just ignore if there is never going to be common ground and let them take on a life of their own.