I agree completely that Lagat is a real American. But as you point out, young US runners cannot relate to him as they could to someone like Mottram. As American as Lagat is we all know that his early life was not like the early life of 99% of today's US distance runners.
When Shorter won the Olympic marathon in 1972 he inspired hundreds, probably thousands of guys who'd been good to semi-good high school runners but who'd given the sport away to start training seriously. The reasoning, and I knew several of these guys, was that Shorter had run high school times comparable to their own, had a life similar to their own, so maybe they could do something along the lines of what he'd done. There is no way that a Lagat or Kefleghizi can reproduce that response among young American born runners but yes, a Mottram or Gary Lee possibly could.
My son is in his second year of high school racing. He's decent and ambitious. He's not envious or racist. But he was far more inspired when Tegenkamp was a step from the bronze than he was by Lagat's two golds and that isn't a slight to Lagat.
If you're a big fan of Lagat or Kefleghizi or Abdiraman I can understand that you'd like them to get universal acclaim here and that's your privilege. But if I, or anyone else here is more a fan of Mottram or Craig or Tegenkamp for whatever reason that also is our privilege and you have no business assigning your own narrow minded and nasty motives to us.