Complex sentence: That was distasteful to the deeply religious Rush, who is now a born-again Christian, resumed his education in the early 1990s at McCormick Seminary and received a master's degree in theology.
Split into simpler sentences: That was distasteful to the deeply religious Rush, who is a born-again Christian. He subsequently resumed his education in the early 1990s at the McCormick Seminary and received a master's degree in theology.