I'm an atheist and a scientist, but I hate the arrogance and the scientism of the so called "new atheists". I have religious friends and I don't think I'm smarter then them at all. I like to learn about the history of philosophy and many interesting ideas were born in religious contexts and seriously discussed by people just as intelligent as we are today. Many of these questions are still open.
Politically, I think the institutionalized forms of religion are pretty much all reactionary. But part of the ideology/theology can be reclaimed for good as well as some spaces and resources.
The RevLeftRadio podcast has several episodes were they invite religious people who are also communists. They have episodes on Islam, Christianity and Buddhism.