When James II became king many people opposed him because he was a?

When James II became king, many people opposed him because he was a Catholic, which raised fears of a return to Catholic absolutism in England. His policies, including attempts to promote religious tolerance for Catholics and appoint them to key positions, alienated Protestant subjects and sparked concerns about the erosion of Protestant rights. This opposition ultimately contributed to the Glorious Revolution of 1688, which led to his overthrow and the establishment of William and Mary as joint monarchs.