This puts him in the same philosophical camp as the terrorists he denounced. He just argues for a slightly lower degree of violence in response to another's expression.
No, that's a very abstract stretch I think, although in some sort of odd platonic ideal world maybe you are right. Common sense, which is the basis of philosophy (or at least the rational starting point to investigation) tells us that it is not unreasonable for a person to be insulted if you attack something they care deeply about. Civilized society, which is concerned with maintaining order and justice, tries variously to balance how we allow a person to respond to attack against societies need to maintain that order and justice. There is of course a variability here because of cultural difference. Some cultures permit more aggressive responses than others. Most justice systems take both the crime and the context into account ('fighting words', example). And some philosophies promote certain ideals ('turn the other check") although they will all acknowledge this can be very hard (even the Pope here is admitting he'd have a tough time forgiving someone for insulting his mom, which is reasonable and understandable; although a former Pope did forgive a man who shot and tried to kill him, face to face).
Even though cultural difference and philosophy (religious or secular) promote certain ideals and try hard to not be too dogmatic and allow for individual context (at least the ones that actually catch on), there are few cultural contexts that say, "If you hear fighting words its ok to take a machine gun and slaughter a dozen unarmed people". This is likely because a culture that allowed that would be self destructive and tend not to last very long, and such a culture would probably be stressful to live in, and fail to catch on. On the other hand if someone insulted you in the street and you punched him/her we might let you off with community service or similar.
There is a world of difference between a punch in the face and machine gunning a dozen people. Only a mostly meaningless philosophical abstraction would somehow allow that 'these two behaviors are ultimately the same thing'. A society based on a philosophy like that would likely have a hard time enduring. I would also think someone that believed this is living too much in their head and not out in the world experiencing reality. Having been myself in street fights and having had a machine gun pointed at me in aggression I can assure you there is a big difference.