Fatah are the lesser terrorist rival of Hamas! The Reason why it's considered lesser is because unlike Hamas they do not use human shields but they still want Israel eliminated from the map!
Fatah is a major Palestinian political party that began in 1965 as the Palestinian National Liberation Movement. Yasser Arafat and friends from Algeria founded the organization, which was originally opposed to the Palestine Liberation Organization that is today one of the largest terror organizations in the world. With Syrian support, Fatah started launching terrorist raids against Israeli targets in January 1965 from Jordan, Lebanon and Egyptian-occupied Gaza. Fatah carried out dozens of raids exclusively against civilian targets in its early years. After taking over the PLO in 1968, its popularity among the Palestinian public decreased significantly. Today, Fatah is the PLO's most prominent faction.