The same Mufti that has led the massacre of innocent Jews in Hebron on 1929, of course long before the Arab Muslims came up with the fake "occupation" excuse for their bloodshed.
In fact, the Jews began by buying land that was pretty much useless for agriculture (the vast majority of the country, due to raising goats). The drained swamps (leaving enough left for water fowl), they carefully built up the topsoil on barren land by manuring and importing soil from other parts of the country. In short, their industry began to turn a dsert into a garden. The Arabs were shamed by their own lack of initiative, plus the effendis felt threatened because they began to lose fellahin labor to the Jews. Much of the historical hatred of Arabs in this region is based on a major-league inferiority complex. Much of the rest is based on hate propaganda spewed by the Arab MSM. Arab and Islamic culture provides the remainder.