The continuing Arab refusal--aided and abetted by the United Nations - to recognise the international legitimacy of the Balfour Declaration 100 years after it was first issued on 2 November 1917 - remain the greatest obstacles to resolving the Jewish-Arab conflict.
The current Arab culprits are the Arab League, the PLO and Hamas who unconditionally reject the binding international legal validity of the Balfour Declaration. However their efforts to nullify the Balfour Declaration would have been undermined long ago had the United Nations not lent its support by propagating a fictitious narrative of the Jewish-Arab conflict.