The first remark, about “ongoing attacks on Judeo-Christian beliefs” is too fucking stupid to even deserve a response.
The question about why nobody else in the theater had a gun is also idiotic. Gohmert doesn’t know whether or not anybody else in the theater was carrying a gun. He just assumes that if they were they would have shot the attacker.
Think about it. You’re in a dark chaotic smoke-filled theater full of panicking people. The shooter is armored and carrying more firepower than you. Do you shoot, hoping that you’ll manage to hit an unarmored spot; one that will take him out before he returns fire in your direction? Do you shoot, risking hitting someone else?
Now suppose one or two other people are also carrying and also decide to be heroes? You see other people shooting. Maybe they’re accomplices. Maybe they think you’re an accomplice. Do you shoot at them? Do they shoot at you? Maybe in a smoke filled theater all you see are muzzle flashes - do you just fire in their general direction?
Will a wild west shootout in a dark theater full of panicked people really help the situation?
How the hell do assclowns like this manage to get elected?