Is there some minimal number of school shootings that's acceptable? My position is that we clearly have shown that this country cannot be trusted with personal possession of firearms, so let's all calmly proceed towards no longer having them around.
At the same time, it was laid out in the Federalist Papers (No. 46) that the intention of our Second Amendment is to protect against government tyranny. To summarize the American philosophy: School shootings and gun violence are awful, but the possibility of a genocide or enslavement is worse.
I'm not enough of an expert in any field to speculate which is objectively better, however I've always personally believed that the U.S. will be safer when viewed in a longer timescale compared to our neighbors.
But when it comes to guns we just throw up ours hands and say whaddya gonna do.
Stop acting like there are no laws about guns, as that's ridiculous. Funny how in Parkland and it seems even with the YouTube office the police were aware of threats these people posed and did nothing. Seems like there should be more scrutiny put on the police, instead of a push to rely on them to defend the public; something they aren't even legally obligated to do.
Even in this very unlikely case your gun is going to be very useless. Maybe you could shoot yourself.
The down side of having guns in many (dumb/unstable) people's hands is pretty well discussed already.
That assumes a large enough portion of the population that wants to resist owns guns. I wish more liberals (especially groups likely to be persecuted) owned guns for this reason.