Well .. I have a theory - the "sacred Arab lands" is nothing more than the land GOD promised to Abraham and his heirs - "from the great river [Nile] to the Euphrates".
The Arabs believe the land is theirs because of Ishmael - Abraham's first born [but he was born of a slave woman].
The Jews believe the land is theirs because of Isaac - who was the first born of Abraham and Sara - his wife.
The fight is over the inheritance rights to the land - by the descendents of two half-brothers.
That's pretty simplistic - and there may have been some political and other factions mixed in .. but the basis of the argument between the Jews and Arabs comes from Abraham's inheritance - and who is really the true heir.
This is why the Arabs want to push Israel into the sea - because they don't want Israel to claim the inheritance.