I just want everyone to be nice to one another
As admirable goal as that is, the problem is that positions of privilege allow some very nasty things to be said and justified as unquestionable, sacrosanct and beyond challenge because they are religious.
The problem is these standards (usually involved in guilt tripping for a wide range of natural sexual behaviour) are not religious in origin, and they are irrelevant when it comes to the concerns of a hypothetical deity. It is thinly veiled bigotry that has been given protection it doesn't deserve, and that desperately needs to be challenged every single time it comes up. Too many people have killed themselves because of the harassment and isolation forced upon them because of religious pressure.
I dont care/mind if someone is christian. I do mind if someone christian tells gay people they will burn in hell.