Huckabee hit it in this article, that indeed the removal of God from schools is the underlying reason why we see this escalation of violence on innocents like our children. But more specifically, it is because our children are indoctrinated with the theory of naturalistic evolution (that we evolved out of chemical mud and goo) by our government, so that the people will look to government as their savior/deliverer, and give the political elite all power and right over their lives.
This is precisely antithetical to the ideas our nation was founded on! Our country was founded by Protestant Christians who were fleeing from the pseudo religious governments of Europe, because they would not allow the pilgrims to live their lives in obedience to Biblical truths. Yes, and the two main groups in power were the Anglican Church of England, and the Roman Catholic churches. I think the Anglicans have a reformed branch that is nothing like the State Church, but the Roman Catholic church compromised with Constantine early on, and when it became a world ruler in 752, when the then current pope courted King Pepin, and received central Italy to rule over. But Jesus said "My kingdom is not of this world" (Jn. 18:36).
The early Americans knew and understood that they needed to own and keep guns to protect themselves from political powers, yes, from governments that were over-reaching their means. And that is precisely what the U.S. government, and who knows, maybe the U.N. will join into this hubbub too, as they "seize citizens ownership" to own guns for life and liberty. Without guns, it's alot easier to control the citizenry.