Intolerance of all sorts is increasing in our society, and there are offenders everywhere. I can't vouch for everyone on my side of every debate, and I don't want to tar others too quickly with the obnoxious behavior of people on the other side. But I have my limits. It is my perception that those who, in various ways, nowadays assume they are on "the right side of history" on (name your issue) often assume that they don't have to argue any more; they can merely smear. They are not gracious winners (if they are, in fact, to be winners in the long run). So, despite their claiming the high moral ground in whatever debate we're having, they reveal themselves to be persons who are deficient in character.
At some point, I just don't want to keep up with them any more.