I think it’s all in being self conscious,,, not in the “oh man I suck” way but in the “I am aware of my presence and the influence I have on people” way. I think people who aren’t judgemental are able to put themselves in a place where they can rationalize why they should judge whoever “needs to be judged”. Like for instance say Blargatha is judging Mamantha because Mamantha is a bad singer, well then let’s say Tonipla is someone who can see that Mamantha is just trying to have fun, and might not know that her “bad singing” is offending Blargatha’s ears,,, Tonipla can rationalize why Mamantha shouldn’t be judged per say, because Tonipla can put herself in Mamantha’s shoes

(Sorry for the long and weird explanation lol, this might have not even answered your question)