Hielo, you can found a church based on just about anything. Good for tax breaks and such.
However, I think you'd have to do some research about the state of Freedom of Religion in this country before you would want to stake your RKBA on it. For instance, there was a Supreme Court ruling a few years back that pertains.
If I recall, Native Americans can't use the drug peyote in ceremonies anymore. I think that the ruling that came down was that the community had a "compelling interest" in suppressing the use of drugs, and that compelling interest overrode the right to worship as they wished. You could look it up, I'm too lazy. But if the gummint decides it has a "compelling interest" in keeping citizens from owning firearms, hiding behind religious freedom isn't going to help.
Point is, you'd probably be better off manning the first line of defense (2nd Amendment) rather than abandoning it for a hidey-hole that may not protect you any better.
FWIW.
pax
"The Clinton administration launched an attack on people in Texas because those people were religious nuts with guns. Hell, this country was founded by religious nuts with guns. Who does Bill Clinton think stepped ashore on Plymouth Rock? Peace Corps volunteers?" -- P.J. O'Rourke