Weaponizing teachers. Including those in private schools and nuns in Catholic schools? A gun-toting representative of GOD armed to kill?

What about "THOU SHALT NOT KILL"? Is it okay because a president says it's okay?  What about priests and  altar  boys? Is there a limit to arming folks so they can kill to prevent others from killing? There is something very odd about that to me. Kill or be killed. Ah another question. SIGH