Unseemly behavior will turn a very attractive person into a hideously ugly ogre, in my eyes.
I’ve lost friends, nay I’ve dropped friends, because they mistreated someone or acted without regard to how their actions affected others.
That’s not to say I’ve never acted the fool. But there’s a big difference between arrogance and not knowing any better.
If someone takes the time to enlighten you but still you proceed with impudence, you have shown yourself to be an ass, and therefore unworthy of my time.