In my experience, those who are most empathetic are generous in spirit, which would include not necessarily revealing to you that they are very religious, as well as in generosity toward those in need.
Societally, not sure it matters much. OTOH, I think it's probably more fair to compare church giving relative to the tax breaks they receive, rather than simply say they give a lot. They do, but it's amplified by a tax deduction, which isn't available to emotionally supporting/empathetic people.
There is, of course, no reason someone couldn't be in both camps, but this comment is long and rambling already.
It’s pretty hard to compare. Perhaps donations isn’t the right measure. What is more accurate?
Anecdotally, the homeless people I've spent time talking to seem to appreciate the conversation (or maybe being treated as a human being?) as much or more than the dollar or two I frequently give.
Utilitarianism might suggest donations as a decent proxy. Can't say I disagree, although I'd like to know how generous churches can be if they didn't receive a tax break.