Yep! Even in a right to work state, if they haven’t documented any concern with performance in the past then his employer is going to have a tough time convincing a judge/jury about their grounds for termination. Get a lawyer that works on contingency and/or explore the road of an EEOC complaint.
Edit: if you push, they’ll be inclined to settle rather than take the risk of the publicity and risk involved with going to trial on this claim
The dirty kind