Black athletes should be next according to such logic. The ex-Soviet camp (especially Russia and its satellites) talks all the time that black athletes have physical advantage over white athletes No black marathoners, no black sprinters. Yeah, it's discriminative, but... we won't win otherwise.
"We aren't racists... we just want to ban all blacks". It's not a sarcasm, this is real attitude even among certain coaches & athletes. The laboratory can issue "the right" decision and the case is closed. They would have done it already if not USA.
Btw, one of our current F800m runners wrote "Those blacks!" in her FB after she lost and then deleted it. She also liked a racist comment.