Britain did in fact give the land to the Israelis.
Who owned the land in the 13 original American colonies, before the Declaration of Independence?

If you say the King of England, then you buy into imperial power and the idea that people who live in a country don't own it, but some guy on another continent with a fancy piece of paper has some rightful claim.

If you say the colonists, then you buy into the idea that people should be self-governing and have the right to own property. These are values embodied in the US Constitution. Many people focus on the right to free speech, religion, assembly, etc as the primary focus of the Constitution, but the guarantees of private property are the basis of the whole deal.

The people who lived in the Palestine prior to the Balfour Declaration had rights, inalienable human rights, that were stripped away by the creation of the state of Israel.

Everybody posting that they had no rights to the land would howl like a stuck pig if all of a sudden the King o' England gave another group the rights to your land. I know I would.

ichi