I am very, very nice... unfortunately being nice doesn't mean people are going to like what you say or agree with it.. One isn't not nice just because we say things others disagree with.
Disagreeing and being disagreeable are not the same thing Addb. One can disagree while being extremely agreeable. It's called having good manners. Being polite. Not resorting to invective/insult/ridicule. Thank you for your reply! :)