Looks like Kristof is getting his talking points and marching orders from the Brady Campaign.
All of their pathetically pleading fund-raising e-mails use pretty much the same wording.
Except in this particular article, Kristof goes further and justifies terrorism on account of accidents kill more Americans. 
Fatal accidents = bad.
Islamic Terrorism = OK.
Oh, I almost forgot: Guns = bad (except OK for Islamic terrorists to use them).