Joseph Epstein said this quote

“ Conservatives and those on the right are usually willing to settle for thinking themselves correct on political issues; those on the left have always needed to feel not so much that they are correct but that they are also good. Disagree with someone on the right and he is likely to think you obtuse, wrong, sentimental, foolish, a dope; disagree with someone one the left and he is more likely to think you selfish, cold-hearted, a sellout, evil-in league with the devil, he might say, if he didn't think religious terminology too coarse for our secular age. To this day one will hear of people who fell for Communism in a big way let off the hook because they were sincere; if one's heart is in the right place, nothing else matters, even if one's naive opinions made it easier for tyrants to murder millions. ”