Exactly. And if you lived in a society that had the kind of moral rectitude that people would care enough about each other to engage in that kind of private charity, you would be living in a Christian society.
From my experience, Jews are also quite charitable. I also know a number of atheist people who are very generous with their time and money. I don’t personally know any charitable Buddhists, but I’m sure they’re out there.
I've never before heard anybody assert their religion has a monopoly on charitable expression.
Christians more or less invented the idea of large-scale charity. Sure, other people are charitable, to be sure. But if we're talking America here, the most consistently charitable people are devout Christians.