While I must admit that the Anti-American heel-heat is one of the quickest ways to get yourself a top spot and thousands of angry Americans against you.. the fact is it's too one dimensional. What I mean by that is, look at all the individuals that are being praised so greatly for their work.
Sgt. Slaughter: The guy was literally nothing until he turned on America. Sure, he won a World Heavyweight title.. but he was transitional in the greatest way possible. He was never Championship material, and he didn't even win it in a anti-american heel way, he had another feud interfere to create itself and the title fell into his lap.
He cut anti-american heel promos in the best time to do it.. when America was at war. And what was he? HE was the guy siding with the enemies we were at war with, which was perfect for creating the quickest and nastiest heel heat possible.. but when it was all said and done, once Hulk Hogan defeated him he was nothing again.
So in the end, you didn't create anything that was long lasting with him. You created something that lasted until he was defeated roughly one or two times. I recall Hulk Hogan taking the title, then Warrior and Hogan ending them a Pay per view later. After that, I went back to forgetting who Sgt. Slaughter ever was.. because he faded into being a nobody again.
Muhammad Hassan: Another great example of taking a gimmick, and using it at the best time possible. Hassan was so hated the company ultimately had to release the guy mainly because of a segment that was pre-taped before it's accidental real life counterpart.
Now not withstanding the guy who played the role never had a great deal of love for being a Pro Wrestler.. the fact is, this is another reason why Anti-American gimmicks don't work for you in a good way.
Sure, you create massive heat from the instant. But you never get over that heat, and in the end.. the fans go from wanting to see someone beat you.. to wanting to see you fired in general and not caring about anything else.
You can't repackage these people. You can't reuse them. Davari is in T.N.A. STILL using a "terrorist" type gimmick, because he can't be repackaged since being known as "a terrorist".
Sgt. Slaughter is somehow getting over again as a good guy, but I think that relates more to the fact that A.) A Decade passed. And B.) Wasn't he a big part of the cartoon G.I. Joe? I can't recall if it was before, during or after.. but I'm pretty sure most people came to realize that Slaughter wasn't a terrorist, he was a traitor that felt in the end he "made a mistake" and as a "loving" (I laugh) country, they accepted him back.
So, in the very end.. Anti-American gimmicks work for heel heat in a quick, instant way. But once they're done with the angle.. you're fucked for Career growth.