People have utterly lost their sense of humor.
Here is the full quote:
He [Obama] warned that the general election campaign could get ugly. ?They?re going to try to scare people. They?re going to try to say that ?that Obama is a scary guy,? ? he said. A donor yelled out a deep accented ?Don?t give in!?
?I won?t but that sounded pretty scary. You?re a tough guy,? Obama said.
?If they bring a knife to the fight, we bring a gun,? Obama said. ?Because from what I understand folks in Philly like a good brawl. I?ve seen Eagles fans.?
That wasn't a threat. It was a joke.
Obama, Guns and ‘The Untouchables’