I think this is the most accurate answer. If he was white guy from the right family, he would be a hero for exposing flaws in the financial legal systems. But he is son of brown immigrants, doesn't sound like he had any high level connections, so he is the villain.
I don't think it particularly has anything to do with his color. He isn't a member of the banking class in Europe and he humiliated them by bringing press to the loopholes they've created (deliberately or otherwise) so they're going to make an example out of him.
