No, it was not the Balfour Declaration that created the mess in the Middle East.
It was the Skyes - Picot Agreement.
The Balfour Declaration was the model for a peaceful Middle East - each ethnic group living in an homogeneous historic homeland.
Israel is the only successful country in the Middle East.
Other small ethnically based states need to be created out the of mess that Sykes - Picot created. A Kurdish State, Sunni Arab States, Shiite state. Alawite State etc.
Looks like the Druze want to join Israel - 6 villages in Golan voted to join Israel.