Precisely. I don't care two shits whether God exists or not, frankly--that's not the interesting question. And "scientific materialism" is a bad way to cast it--materialism is a metaphysical system while science is an epistemic system.
I'm nonreligious because I don't believe claims without a good argument behind them. Buddhism is a set of claims without any good arguments just the same as Christianity, whether or not those claims are about gods and resurrected demigods or not.
I agree that's probably true, but I don't understand your point. I was just observing that Buddhists are likely to also be atheists, since the OP seemed to consider overlap unlikely.