Just curious about the P-51 FM

[JtD]

You can continue to insist...

I haven't even started insisting on anything. So leave your polemics out and try to argue the points I make, not invent some on your own and then go on to debate them with yourself.

You made the claim that the Luftwaffe was "easily winning" the air war in the west until the appearance of the P-51. That's simply not true. You're of course free to insist, but you won't change facts.