Texas Small Town Church Terrorism

The guy who shot up the church should have been denied guns already because of his mental condition. He was already easy enough to spot. I'm not sure about the Vegas shooter but i'd be all for any measures that would have identified his dangerous tendencies. What we don't want to do is restrict reasonable gun possession from responsible people, but be able to keep them out of the hands of the dangerous ones.

I don't think that's true. The church shooter was already known to be dangerous, the question is why he was allowed to have guns. There should have been clues in many of the other cases too if anyone was paying attention.