Leftists have moral contempt for those who differ with them
Our age loves scientific equations. Here's one you weren't taught at college but which affects you as much as the law of gravity:
GI - W = E
Good Intentions (GI) minus Wisdom (W) leads to Evil (E).
You weren't taught this rule at college because the modern university believes only science has rules. "Rules of life" is another term for wisdom, and there is no wisdom -- or even pursuit of wisdom -- at our universities.
Life has rules just like the natural sciences do. Examples include:
Ingratitude makes happiness impossible.
Corrupt people think everyone else is as corrupt as they are.
Human nature is not basically good.
Feelings are far less important than actions.
Most men need a woman to mature. Most women need a man to mature.