Which can be summed up as a belief that this life is not all there is. That justice will prevail in the afterlife, that suffering is somehow all for the good even if we can't understand how.
No, not really, not all religions beleive that.
But all of these delusions are just what Marx said they were, opium. They may soothe the pain of reality but they also dull the rage we ought to feel at injustice and the urgency of change. I can't thank you enough for raising Mother T. as a perfect example of the way religion makes a virtue out of the suffering of the oppressed but does nothing to challenge the status quo.
Yes, in the case of MT it woudl seem that She did nothing to change the status quo, though having read from those that actually met her and saw what she did, that doesn't seem to be their view.