Absolutism has nothing to do with having the right to treat others as you please.
Of course, people will complain that you treat them badly because you refuse to concede that you might be wrong, that they might be right, that their own view may be right “for them” and so on. However, that has nothing to do with treating them with kindness or without it. If they want to call it treating them without kindness, then that is their problem. I’ve been called various names for refusing to put things in the grey and make a tentative concession, no matter the manner of discussion. However, generally, good manner of discussion helps handle many, many disagreements.