I think the bigger issue here, and the reason I do consider religion the source of every evil in the universe is that religion trains you to reject reality, and live in a world of "faith". So in this case you have faith that god cured you of your cancer, and then you die from it. the problem is it is quite probable that the priest who told you you were cured actually believed it, because he too is living in a world of faith. that is why I place the blame squarely upon the religion, not the people practicing it, now some individuals may attract some specific ire from me, but in general I blame religion. when you live in a world of faith you can believe anything, it doesn't have to have any bearing on reality (in fact usually that is encouraged), and when you can believe anything, you don't even have to justify anything. if you think that some country is nothing more than a great temptation away from the grace of god, you can gleefuly kill thousands knowing that they will get the justice they deserve in the next life.
and the best part because your worldview is not based on reality, there is nothing to justify, this was the will of god. based off of what you 'know' this was totally the right thing to do.