As for the various religions, there's no doubt that they are very meaningful to adherents, and allow them to delude themselves into thinking there is some meaning to their lives beyond what we agree is the case. I'd never try to talk them out of the delusions, which are necessary for them to live a life that makes some sense to them. These beliefs can provide a framework for deeds that are noble or savage, and anywhere in between, and there's every reason to focus attention on the deeds and the background for them, to the extent that we can grasp it.