Personally I'm not religious, but people's religious beliefs, regardless of the denomination, keep a lot of people on the straight and narrow. Everyone has some sort of framework too contextualize their life, religion, science, dairy farming, whatever. Yes there have been, and are being terrible things done in the name of religion (whether that is true is another debate) but like everything religions evolve. I'm sure Christians of the middle ages would be horrified to see what modern Christianity has become. If every religious person lost their belief system overnight it would be anarchy. So IMO, people are entitled to believe what they want so long as they respect that others can do the same.