well, that was kinda my point. everyone thinks what they are doing is right, so what is right and wrong is too subjective to really have any concrete definition.
the world isn't black and white enough to be able to have a definite right and wrong... ther eis too much gray. stealing bread is supposedly wrong, but is stealing bread to feed a starving family? is it wrong to withold said bread from said starving family simply because they can't pay for it? that example is pretty cliche, but it is a simple illustration of how much gray area there is in life, and because of that gray area one can't simply say that someone else is morally wrong just because their belief systems don't agree on some issues.
look at pro-lifers vs. pro-choicers.... both sides believe they are morally justified in their stances, but both have valid opinions on the subject. neither side truly understands the other because of that deep belief, and thus they simply label the other side as "wrong".
the more I tihnk about it the more I feel like today's "right and wrong" are just words used to enable persecution in a society where old fashioned "burn em at the stake" persecution isn't allowed anymore. but then that is just an opinion.