Calling oneself “Christian” these days means you have ties to one of the business-gospel “churches” and are not Jewish or Catholic or Muslim. That’s all. You don’t have to know the first thing about Jesus (who was actually trying to teach the Jews of his day), or the Apostle Paul who’s mission was to the Gentiles (Goyim).
Announcing you are “pro-Trump” implies a sub-room-temperature IQ and a disdain for facts of any kind, and implying that everyone else should reset to your level as a lowest common-denominator.