Simple math.

It's simple math. In a few short years, Americans will win every bike race on the planet. Why? It's simple. Only Americans will be racing bikes !! You'll see the logic in a moment.
EuroTrashies are an impertinent bunch. Give them a 2 second bonus or a free water bottle for a stage win and they will inevitably begin to smash their bikes and bodies into whatever hard pointy surface is available !
"Mon Deu!!! Hanz! is zhat not de feenish line ahead?" "Ya Pierre it iz dee line, perhaps ve should acclerate our bikes to 60 kilometers an hour und start running into things? No?"
Not unlike a Max Sennet movie, EuroTrashies speed up, bunch up, and then start crashing as hard and as fast as they can. It's the EuroTrashie way of things.

So, in a few years their athletic prowess will no doubt knock enough of 'em outta the gene pool that the Freds and Bobs and Franks and Floyds will run amuck.
In a perfect world anyway.