It is their concern, their burden, not mine. They chose it. I didn't.
For some people, believing in something can enhance their humane qualities. For some others, it doesn't, it can even have the reverse effect.
It doesn't mean everything is relative, though: some religions are clearly worst than some others too, depending on their ideological dogmas.
But we have to always differentiate the individual (the person), and the way he is influenced by society, unless we want to commit sophistries or gross generalizations.