A common criticism of religion by atheists is that the practice wastes time and money. Many atheists argue that religion misplaces charitable givings. The argument is the effort that’s spent on superstitious ritual could be spent on social justice. If you don’t believe in God and claim to have humanitarian values you should feel indignant when effort is used to save someone’s non-existent soul as opposed to their life.
This is true for most religions. A man who cares about the welfare of mankind should be upset with any delusion that distracts people from what actually matters. If you’re religious the extremity of this should bother you even more since you believe life continues after death. An atheist is generally concerned with what happens to someone in their mortal life. A religious person is concerned with what happens to someone’s soul (for many this also includes one’s life).
If you are a Christian you believe other religions and atheism lead people away from accepting Christ as their savior. This should be a moral crisis if you believe without accepting Christ one will be condemned to perdition. It should cause you grief to see money circulate through any church that isn’t your own. That money could be spent on any number of things to spread the good word and save souls from damnation.
It’s very simple. If you’re an atheist you see time and money wasted on superstition that could be spent on a practice with an effect in this world. If you’re religious you see time and money spent on encouraging the name of the wrong god(s) and souls being dammed to hell.
Understanding this principle should lead you to question which beliefs are true and which are not. Billions of souls/lives depend on it.