I grew up in the Baptist world, and I've always found this stance to be nonsensical and deeply ignorant. It's not possible to reconstruct common Baptist beliefs and teachings from the Bible. It just isn't. Unless you already know what common Baptist beliefs and practices are, The odds of being able to reconstruct them using the Bible approach zero so closely they might as well be zero.

Certainly, Baptists have creeds and common beliefs. They just don't write them down as if they were creeds and mandatory beliefs.

That doesn't make them any less real.

Any Baptist who claims otherwise would have to be extremely ignorant, terminally stupid, or both.

What my experience growing up Baptist (from Southern Baptist and independent Baptist, to GARBC) taught me is that the biggest thing Baptist believe in is their own moral superiority. They believe they're better than "the world," and they are almost always highly self-congratulatory about that.

Truly, a bunch of seriously disgusting, evil people. Maybe not the worst of Christianity, but pretty close to it.