against those who disagree with their beliefs.
Using firearms is a martial art. Those who oppose RKBA and dislike gun owners could fairly point out that often a student in a oriental martial art has converted to an eastern religion because their particular art was heavily influenced by the spirituality of the religion.
Some extreme Christian groups do favor gun ownership, but I have met very few guns owners who couldn't separate their religion from their hobby. In fact, most of the regular shooters that I have known have not been religious at all.
There are some "commandments" for safely using a firearm. I guess you could easily make those into a religion, but it would be limited and would fail to deal with most of the problems humans face.
And Charlton Heston journeyed up the mountain and returned with two metal targets with these ten commandments punched out by rounds from a Barrett 50 caliber sniper rifle at a range of 3000 yards. 1. Thou shalt always keep the muzzle pointed in a safe direction.
2. Thou shalt unload your firearms when not actually in use.
3. Thou shalt never rely on your gun's safety.
4. Thou shalt be sure of your target and what's beyond it.
5. Thou shalt use proper ammunition.
6. If your gun fails to fire when the trigger is pulled, Thou shalt handle it with care.
7. Thou shalt always wear eye and ear protection when shooting.
8. Thou shalt be sure the barrel is clear of obstructions before shooting.
9. Thou shalt be careful of altering or modifying your gun so as to render it unsafe and have it serviced regularly.
10. Thou shalt learn the mechanical and handling characteristics of the firearm you are using.