Jon Stewart's plea for gun control

I understand all of this. What I don't understand is why they so often speak in vague emotional appeals and fact-averse conjecture instead of asking for specific policies to be changed. Why does the anti-gun crowd have such a hard time naming specific policies they want implemented?

I watched this on the DVR last night, and I remember Stewart offering multiple possible changes that could be the solution. The reason I remember this is that he offered a suggestion I hadn't heard before - only allowing assault rifle use at gun ranges. Of course, the usual smaller magazine stuff was offered, and other things. You just didn't watch the video.