If he had been hunted down and killed in this manner within 1 year of 9/11, without going into large-scale foreign conflicts, it would have been much better. We took 10 years though.
Oh I wouldn't be too sure of that. Granted 10 years is a long time, so long that most people would have given up, lost hope, or quit. Then there are the kind of people that only exist as Crazy Americans (though several other cultures also breed them). Those people, pay any price, bear any burden, climb every mountain - ain't no mountain high enough, ain't no river wide enough to keep me from you types - they were always going to win out in the end. There were just X number of people - the kind that tend to end up in places like Delta Seal Team 6, the Pentagon, the Presidential Administration, the CIA - who were always looking for him, and were always going to kill him when they found him. This was no ordinary mission, this was a quest for revenge and justice (either one, epic in and of itself alone) that never quits. I'm not sure it doesn't send an even deeper message. There are people in the world who are not 'off topic' ever. Not for a minute, not for a second - can't distract them. Do Not Piss Them Off. Also: DO NOT ATTACK THE UNITED STATES WE WILL VERY SERIOUSLY ->-bleeped-<- WITH YOU - ask Japan.* No matter when it's postmarked, all that matters is that its delivered.
As for the whole hunted him down and killed him. Yeah, 'bout that... Just imagine, had the Royal Wedding not gone as planed, had some terrorist got in and killed Kate, Willis, Harry or Liz? How long would MI5 and those highly elite SAS and ex-SAS soldiers hunted that person down? Would they have quite after one year? Four? Ten? How 'bout never? How long did Israel and other Jews hunt down the ex-Nazi's who ran the death camps? Yeah. So about America.... I mean the very real reason that heads of state are not ordering the assassination of other heads of state on a routine basis is that whole bit about revenge. It's not that they are gentlemen, nope. Far from it. It's that they know, that they have guys who would do that, as does the other side. Checkmate.
* - Or you could go with any of our fine number of domestic brands, like asking Tim McVie, the people at Waco, MOVE in Philadelphia, what's it's like to declare war on the USA, even if you're doing it from Texas or in the cradle of the nation.