Complex sentence: However, some factions of the movement grew resentful since the policies of Ibn Saud appeared to favor modernization and the increase in the number of non-Muslim foreigners in the country.
Split into simpler sentences: However, some factions of the movement grew resentful. The Ikhwan were disappointed at the policies of Ibn Saud which appeared to favor modernization and the increase in the number of non-Muslim foreigners in the country.