Omar Mateen claimed at various times to be aligned with terrorist groups including ISIS, Hezbollah, and the al-Nusra Front. Rolling Stone's Tim Dickinson does not consider any of those bloodthirsty outfits “the greatest threat to our homeland security today.†That description, Dickinson argues, best fits the National Rifle Association. “The NRA's unhinged gun advocacy,†he wrote in a Wednesday article, “has created a soft underbelly to our homeland security that radicals are exploiting to inflict mass murder.†Dickinson declared, “Make no mistake: The NRA paved the way for the Orlando attack,†given that -- “ The NRA's lobbyists and political...