The most important lesson to learn from all this is that so long as we live in a world where grownups can publicly use religious beliefs as a justification for

The most important lesson to learn from all this is that so long as we live in a world where grownups can publicly use religious beliefs as a justification for serious decisions, we will also have to live with other people with guns using religion to rationalize their crazy actions, too. We simply have no grounds on which to tell them they're wrong. The solution is, as you say, to stop talking about them.