Leftists believe they are unimpeachably and fully right about everything and are disdainful and angry at those who somehow disagree.
Their own obvious hate is invisible to them but they see it clearly in anyone else who is not in line.
As the “No Room For Hate On This Campus” placards when they set fire to an overturned police car on campus at night and broke all the windows in the dorms and class buildings on one side of the campus in order to force the college to rescind the speaking event of Ben Shapiro and Ann Coulter. (She called it mob veto.)
The angry mob stopped the “hate” except for their own.
Whenever I see a “Hate Has No Home Here” sign, I know hate has a home there.