but I hope you’ll agree that the source materials have a lot of outdated beliefs

So does Reddit New Atheism.

There’s no special monopoly on unqualified false expertise, bad hubris-laden ideology, or even propaganda that justifies murder and mayhem that is exclusive to religion, and not all of it is ancient. In fact some of the most fucking ignorant people in the industrialized world get taken for a ride and get into some very bad beliefs because they think that abandoning religion makes them objectively smarter than everyone else and immune to being fooled.