Progressives are, by nature, tolerant.
Actually, by nature, "progressives" are the least tolerant because they already think they know all the answers.
The very few people who actually do know all the answers and the greater majority of people who know they don't know all the answers are much more tolerant, IME.
I wonder if there is some kind of rule of thumb, like if you think you are insane then you aren't, if you think you are the most tolerant people then maybe you aren't?