From NY Daily News:

The permissive public carry championed by today’s gun rights advocatesis a sharp break from all this. It is not rooted in text, history or tradition but is a recent development in American history, one that only gained ground in the late 20th century. Such laws have not made Americans safer, but have led to more gun deaths and injuries. It’s little coincidence that states with stronger gun regulations are also those with fewer gun deaths.

That last line is in bold because Cornell is actually using the shooting in NY to argue there should be more gun regulation even though the shooting he is so “upset” about happened in one of the most strict areas of the country when is comes to guns.