Complex sentence: He then belittles Carmen and her husband by quoting the Bible to them and calling them "gay"; however he only reacts so because he expected Carmen to call him once she had the operation so they could date again.
Split into simpler sentences: He then belittles Carmen and her husband by quoting the Bible to them and calling them "gay". However he only reacts like this because he expected Carmen to call him once she had the operation so they could date again.