Cruz knows he's not going to convince the three anti's to change their minds as they are operating on pure emotion. These kinds of discussions are not aimed at converting that small hard core group who want to ban all guns, rather its aimed at the larger audience of Americans who are on the fence on more gun control. Most who fence sit don't know or understand the statistics and facts behind these mass shootings or crime in general, and they don't understand that almost all gun control laws proposed will not stop such mass shootings or general crime. By having such video out there some on the fence may begin to understand the issue more fully. That is where the battleground is on trying to stop more gun control.