I have no issue with Jordan. I'm not sure what your point is.
I don't see why the longevity of British Mandate Palestine matters. What matters in this particular instance is what happened during and after the break-up of British Mandate Palestine. The formation of Israel, even on the 1947 borders, excluded the Palestinians from vast swathes of their homeland. It's not about "how much" land there was for the Arabs. Could you even imagine if Russia were to occupy part of the UK, forcibly remove its inhabitants, and then give that part to Chechens so that they can do away with what they consider a "problem people"? The Jews do have an historical claim to live in the lands now called Israel, but they do not have the right to forcibly expel Palestinians or to expand their borders through warfare.