Shoebat cannot escape being Ishmael (”And he will be a wild man...”) by becoming a Christian. Neither can Esau/Edom escape his fate without the transformation (tikun) of the Sheva Mitzvot B’nai Noach.
I know. And it's unbelievable how much misinformation there is on this topic. There are so many people who believe one can be an authentic observant Noachide while continuing to observe/practice some other religion (Xianity, islam, etc.). Apparently there are "authorities" out there who teach that these days! Many people are being led astray.