Time for a gun registry and for us to push hard to ensure laws like the one that should have stopped this monster are enforced. Frankly, the Air Force should have put him in jail for years for what he did to his son.

We all register to vote; yet, nobody ever whines about that or claims that the government could use the registry to track down and eliminate political opponents. Similar arguments about using a gun sale registry for wholesale confiscation are just as paranoid and nonsensical. It's time to stop letting the most extreme arguments hold sway. We should never legislate according to slippery slope fallacies, but rather common sense. 

A registry would:
Stop straw purchasers in their tracks, keeping illegal guns off the streets.
Allow law enforcement to know about all the guns violent criminals have, & take them.
Provide police with more red-flags, like Paddock's purchasing spree shortly before the shooting.

Common. Sense.