So not putting an armed responder in place is a betrayal of our children, and those who fight against such a responder being in place are in effect accessories to anything that happens because of the inability of the school to protect the children in their care.
NOT having armed security at schools, making them vulnerable to crazies (20 of the last 23 school shootings were by people just off their psycho drugs and coming off those drugs quickly creates paranoia and suicide feelings), plays into the meme of the Leftists and their attacks on the 2nd Amendment. Without an armed population control by the government is a lot easier, but protection of the public is no better and may be worse. The only people with weapons in Europe are the Muslims. With the police and non-Muslims afraid to go into Muslim controlled areas of their country. France has 750 "ZUS" or no-go zones, with about a dozen in Paris. The same has occurred in England, where the British parliament has given control of zones in England to Muslims and Sharia Law. The Muslims are smuggling arms into their miniature caliphates but the native English citizens have extremely limited access to firearms. So strict that the English Olympic shooting team has to practice outside their country.
BTW, it's not hard to notice that while the Hollywood elite decry personal gun ownership they all have armed body guards. Our elected officials in Washington send their children to elite schools that have armed security as well. They speak with a forked tongue.