The remake of Pearl Harbor was typically "by Americans for Americans", I thought it was just embarrassing. U-571 too, but at least Hollywood doesn't proclaim historical accuracy like the History or Discovery channels do. Sometime the bias is almost too obvious, like that "Top 10 fighters" show; P-51 won with the Spit coming second. The 109 got an honorable mention at number 7... the 262 wasn't mentioned with one word.
I agree with you about those two movies and the cringe reflex, but that's not even germane to the topic at hand here. Your presumption is that because this is an american documentary that it does not convey 'truth'. Well, I've seen a few episodes and though there is nothing earth shaking, it has portrayed events accurately based on the study I've done with regards the war.
The underlying theme though in your comment is that america is superficial though, an unsubstantiated sentiment that seems popular in the 'old-europe-blame-america-first' crowd. This narrative is based on a jealousy of the hegemony the USA is able to convey across the world.
Besides, everyone knows the P-51 was a better plane that the spitfire. The spit served its purpose as a defensive plane and turn fighting well. The 51 was much more instrumental in ending the war though when boom-zoom tactics proved most effective in the war of attrition (including it's range and speed advantage).