To answer a number of your points:

1. Einstein was speaking about American slave owners, who were primarily white. I believe the term 'whites' is inclusive of Jews.

2. Einstein wrote this article in 1946... so there were likely a lot less black millionaires.

3. I think he was only making an observation that the whites around him (not necessarily all the whites around the world) still discriminated and thought less African Americans. He goes on to explain that some of their feelings are reasonable and have been experienced in the past... but are nonetheless flawed.

I'm not sure what your arguments above are supposed to point out... but Einstein was pointing out a problem in 1946... problems which may or may not be the same today.