Democrats thrive on the ignorance of the masses.
They know their bills won't stop crime, but they also know most voting citizens won't care. They just want their representatives to "do something" when a tragedy occurs. Passing bills achieves exactly that.
The average American is thinking:
"Who cares what these bills actually say. They infringe on gun ownership? Well, I don't own a gun and I detest those who do. I am proud that I don't know a thing about guns! Let those crazy NRA member worry about that!"
Then a crisis hits, maybe a hurricane, maybe earthquakes, maybe riots, and the police are nowhere around.
Suddenly they are singing a different tune, but its too late.....