> Running onto the plane again after having been "dragged off" and muttering "Just kill me" seems to point to possible mental issues,
You realize this could be because of the concussion he might have suffered earlier, don't you? Rather cruel thing to throw out there as an accusation after reviewing the video of the incident.
Haha. And everyone who ever got their ass beat by the police should have just did as they were told. Even if they were in the legal right, or racially profiled, or whatever.
But the crew was legally right. And at any rate, the airplane is not the place to have that dispute, legal or otherwise - you follow the captain's (and by extension, crew's) orders, and then you review it later.
In a similar situation, if someone is pointing at you with a gun in a dark alley and ask nicely for you wallet, then the more sensible reaction is to give your wallet.
Sometimes it's not the same sensible, legal and right.