The churches in my town actively participate in feeding and housing the homeless on a year-round basis.

I don't think it's fair, constructive, or helpful to claim that churches are a "waste of space" or to demonize people who believe in a god. I even donate to local churches even though I'm atheist, because I know they try to help people in my community.

I'm 100% certain that I participate in activities that others think are a waste of time, and you probably do too. For instance, I've spent a good part of my life in bars and would attest that they play a critical role in a vibrant social community. But I'm sure there are people in this world who can't understand what good I see in them. Based on this I extend the same respect and support for institutions that I might not fully agree with.