"Right to decide" - Ultimately what the British did was a rough approximation of democratic self-determination, which is a universal human value. The Jews had been trying to peacefully resettle in Israel since the 1800s, and those Jews had a right to democratically secede from any other political entity and for their own independent country. British motivations don't matter; what matters is this right that all peoples, including Jews, have. https://medium.com/non-violence/zionist-jews-did-nothing-wrong-make-turks-pay-reparations-for-oppressing-arab-tenant-farmers-41285f9716bf