Nobody is forbidding mention of modified Newtonian dynamics, just pointing out all the evidence against it.
The idea of differences in intelligence between ethnic groups, regardless of whether it is true or not, is not one that our society is currently able to discuss in a productive way. So, we very sensibly keep quiet about it for now.
In which case it stands to reason that it's something that the things that make this or that race "superior" at this or that metric can be emulated by people regardless of race to everyone's benefit.
yep, you just need money.
On your second point, I don't believe that is true. Not the 100% part. I am sure they play a big part, but a Kenyan Olympic runner doesn't win (only) because of environmental factors.
Do you know how we discovered that causation goes in that direction?