What are the three reasons for the continued conflict between Palestinians and Israelis?

The conflict itself began due to land and politics, the area was British administered after WW-I, the British ended up siding with the Jews in the Balfour declaration and the Jewish State was set in 1948.

The conflict itself later on compounds due to religion, since many Jews see the area as a promised land for the Jews, whilst the area is also where prophet Mohammad established the first church/mosque, the Al-Aqsa mosque, right on top of the ancient Temple of Solomon, the Jewish King.