If every single person in that Vegas audience had a gun, there is still nothing they could have done. Are they all going to aim the guns at a giant hotel? That would not have gone well for the neighboring guest rooms.
If this particular event doesn’t force those being used (and politicians being bribed) by the NRA to see, it’s hard to imagine anything will. We just need this to be spelled out to them. And now. They do not GET to decide when or how this nation grieves. Not again. Not this time.