Uh, no. I know you are probably just trolling by making an excessively stupid and simplistic argument with no reasoning behind it, but I'll give a serious reply anyway.
An outright general ban on religion would most likely lead to a new government led cult. It requires a breakdown of the separation of church and state which would likely lead to a new government/political cult as the only way to do this is to police the thoughts of your populace. Basically, all the sections of our bill of rights ensuring freedom of thought and expression would fall like a house of cards. Rather than cults of idiots following ancient gods, you end up with one big all powerful cult following a political leader or political party backed by the full power of the government. If you aren't allowed to come to religious conclusions on your own, you might as well install a dictator.
I said regulated, because banning is probably not feasible. These kids died because of religion, plain and simple.
If you have a religion you should not be allowed to:
-Own or use a firearm
-Vote or hold public office
Other than that, feel free to believe whatever, it's not illegal, just regulated. Like alcohol or drugs. The fate of the human race is too important to allow simple, gullible minds to influence it.