Complex sentence: Thoros was a Christian of Armenian origin but of Greek Orthodox religion and largely disliked by his Armenian Orthodox subjects; in March 1098 he was assassinated or abdicated (historians conflict), and it is unknown if Baldwin had any part in this.
Split into simpler sentences: Thoros was a Christian of Armenian origin but of Greek Orthodox religion and largely disliked by his Armenian Orthodox subjects, which led to his removal from power i March of 1098. Different sources claim he was assassinated or abdicated, but it is unknown if Baldwin had any part in this.