The US never atoned for Henry Ford, Charle Lindberg, and other Nazi loving capitalists.

They attempted a coup on FDR https://en.wikipedia.org/wiki/Business_Plot

It has been mostly whitewashed in favor of "the greatest generation" and the WW2 hero narrative.

Restricting foreign scientists here is yet another way we are paying for this whitewashing and romanticizing of US exceptionalism today.