Stein Ugelvik Larsen, Bernt Hagtvet and Jan Petter Myklebust, in their Who were the Fascists: Social Roots of European Fascism, wrote that "Fascism is a radical, authoritarian nationalist political ideology". That suits the settlers and the far right in Israel, as elsewhere down to a T.
Cyprian Blamires, in World Fascism: a Historical Encyclopedia, Volume 1, notes that "Fascists seek to purge forces, ideas, people, and systems deemed to be the cause of decadence and degeneration, and to produce their nation's rebirth based on commitment to the national community based on organic unity, in which individuals are bound together by suprapersonal connections of ancestry, culture, and blood".

That'll be the settlers' political leaders, then. Fascist to the core, Jewish or not.