That people who care about science defend it when it is attacked is not proof that science is a religion. Science is about finding out what's going on. It is worthwhile (and worth defending) even if it will never reveal Ultimate Answers and will never be as bulletproof as saying "Ahura-Mazda did it."
He is trying to see if it passes the smell test as a religion. For many - maybe not you, but many - it does.