That's only because whites are assumed to be adequately protected while historically other groups were not. As religion is a protected class you might rely on your Jewishness, but I think your strongest case is that you got fired for being a "whistleblower." That's a no-no. Get a good employment lawyer in TX to lend a hand.
Sounds like retaliation for reporting discrimination. You should speak to a local employment attorney.
My standard disclaimer: I am not offering legal advice or services, assume all of my advice is completely incorrect, assume I do not know the law in your state and assume that I am just making suggestions for starting points for when you do speak with an attorney. Do NOT rely on anything I write and contact a lawyer in your area immediately after reading my posting.