I don't see anything racist in that email., just a businessman trying to do business.
If you want to turn this into a broader, more philosphical debate like "does adjusting your business practices for external, inherently racist circumstances make you a racist yourself?", then it's a critique of capitalism, not of the societal status quo. In any case, Levenson didn't make the world the way it is, and it's not his responsibility to sacrifice his income for some publicly perceived ideal.
If you can honestly claim that you make every decision in life with the intention to strife for this ideal, good for you, but that still doesn't give you the right to demand the same from others, otherwise you're overstepping a very fine, but highly important line. It is the same fine line which seperates Patriotism from Nationalism, or Feminism from Sexism.