Somehow I doubt SCOTUS in the end will come through, and in that case, kiss science and the rule of law goodbye. If I can 'identify' as what I want to be without any basis in facts, get ready for anything from pedophilia to racism to justifying just about any behavior you can imagine.
Or more likely, the govt will play God and the Church and pick and choose what behaviors it accepts and disallows, merging Church and State and completely overriding the 1st amendment free exercise of religion.