Right now wealthy white kids and low-income minorities are educated in pretty much the same way. It's a terrible system, but at least it's more or less equal. What Bill Gates et al. are advocating is creating a completely separate system for low-income minorities, with dramatically more hours spent in schools and away from parents/community. If that's something we want to have an open and intellectually honest debate about then I'm all for that once we have the data, but forcing this program on minorities in secret in bullshit.
I understand what you're saying, I'm just suggesting that your message might get more traction if you phrase it differently, or consider what his motivations might actually be. The guy has donated $1.5 billion to fund scholarships for minority students in the U.S., $750 million for vaccines in Africa, and many other initiatives that I can't remember right now. The idea that he is a white supremacist is laughable. He's practically Robin Hood - extracting wealth from mostly white, mostly corporate America via illegal means, in order to give it to minorities who are poor.
while i agree with your basic point (personal judgement on Gates not adding value to the comment) I'd like to point out that even if someone does some good to non-wasp people he can still be a white supremacist.
E.g. Cecil Rhodes was held in high estimation from the Ndebele people to the point of receiving a king-like burial ritual from them, but he still thought that british were god's gift to mankind.