Really, if a parent is using the threat of Santa to make their children mind, then they have bigger problems. But I'll move past that for a moment. You suggested that marriage equality, legalizing marijuana represents some kind of break down and people take it as a cue to shoot a school room full of chiildren. This is ridiculous. I did not quote mine. I posted your entire paragraph which was completely in line with the tone of your entire post. That somehow, giving people rights will cause others to think they can commit mass murder.
AND you argued that fear of hell can keep them in line. Prove it.
I can point to many secular societites that are not only much less violent than ours, but a great deal happier. Liberal societies where people don't worry about 'stumbling' their weakest link. Your argument is an old and tired one. 'Legalize birth control, and women will all become hopeless prostitutes with no way of regulating their behavior without the fear of pregnancy.' Allow for marriage equality and soon people will be into beastiality.'
Your argument is that we should deny normal people their rights because an abnormal person will take it as a cue to kill people. Well allow me to argue that perhaps a repressive society aggravates mental illness and increases violence. Perhaps telling people they are hellbound makes them feel like they are evil and without hope.
Adults shouldn't watch rated R movies, cuz maybe that will make the kids watch rated R movies. We should all sit around watching Barney and cater to the most vulnerable around us? Makes no sense at all.