I think modern theaters do have exits at both ends, as required by fire code. At least the ones I frequent: Regal People's plaza, Westown Middletown.
Folks who are against gun ownership (notice I didn't say democrats) just have a different mindset. Additional shootings just convince them they are correct that more "no guns" signs need to be hung. I'm happy I live in a state that offers CCDW. If that right is taken away, I will move (after retiring).