You guys are making a potentially fatal error.
This seems to indicate that you believe they honestly don't know the reality of gun control. Nothing is farther from the truth. They know perfectly well that the streets won't run red with blood, they know perfectly well that the AWB didn't cover machine guns, etc.
The antis never learn
The truth is, they don't care! They want to outlaw guns! Period! All their hand wringing and concern is merely an act to sell their gun prohibition to the general public.
By the way, gun control is not a grass roots movement to which the Democrats are responding. It has, for many years before HCI, The Brady Bunch, et al, been a plank in the platform of the Democrat party. These groups have been encouraged by the Democrats in order to make it appear that they (the Dems) are simply responding to their constituents.
So, don't marvel at the fact that they "don't get it". They get it perfectly well but choose to ignore facts in order to sell their ideas.