Read it. It does not come close to saying that.
From the transcript:
It was humanity drew a line decades ago that i think if we ignore, we do so to the peril of many other people who can suffer.
If that is the justification, then I'm fine with it. But, if so, then why haven't we done things to prevent the use of chemical munitions, rather than just react to their use?
We could have bombed them moments after the President's redline speech. In fact he could have changed the speech to something akin to "Use of chemical munitions is an unacceptable act and we will not tolerate it. Therefore, we've just struck your weapons facilities and they no longer exist."
Or he could have sent a secret diplomatic cable to Assad saying something like, "Dear President Assad,
We, the American People, find the use of Chemical Weapons to be unacceptable. The next sound you hear will be your chemical munitions being destroyed. Have fun in your civil war."
Or he could have said nothing at all and had the CIA and Mossad destroy the chemicals covertly. Then all we would get would be mysterious news reports of strange explosions around Syria, similar to the mysterious campaign against Iranian nuclear scientists.
If this was really about a humanitarian gesture to save others from suffering, then we would have done something before they suffered.
Oh, and we would also have noticed the other 100,000 who have died to kinetic (i.e. non-chemical) munitions over the past 2 years and maybe tried to do something about that.
But, since we didn't do anything prior, this really all boils down to saving face, which, having been to war, I can say is a pretty sharty reason to start a new one.