You talk a lot about moral relativism, but ultimately I think this is just another case of you inferring illogical conclusions from a single thing (in this case, moral relativism a bumper sticker meaning "let's try to be cool with one another" and then using said conclusions for an increasingly frantic rant.

Of course, the idea that a person could both possess a rigid moral code and embrace diverse cultures and religions doesn't seem to even enter your mind. I know silent movies that display the world in less black and white terms than you.