I try my best to be civil to people I respect, and there are many such people at DU, but obviously have difficulties with, say, the type of person who complains to scientist about bringing scientific expertise to a science forum.
Again, if this approach to me being unable to appreciate the difficulty I confess to having in not being nice with respect to people who excuse 19,000 air pollution deaths per day because "Fukushima!!!" I would advise them that the "ignore" function is their friend.
All one needs to do is click on my name in this post, and click on "full ignore."
I use this button for the most oblivious people all the time. It works great, and helps me avoid spending too much time confronting the type of insistent ignorance we see on the far right, and regrettably - albeit more rarely - on our side of the political spectrum as well.
As I find myself wasting time now engaging in an exchange of no merit, I'll try that button myself to assure myself it still works well.
Have a happy life wallowing in graciousness.