It meant the British could do with it as they wished. It wasn’t Begin it was the Jewish resistance. It takes an imbecile to defend 10/7. YouThe British Mandate for Palestine meant the British owed the Palestinians for their help with Lawrence of Arabia.
But instead of helping, just like the Ottoman Empire, the British kept the Palestinians totally unarmed.
So then it WAS "stolen".
The invading Jewish immigrants massacred the unarmed Arab Palestinian natives.
Once Menachim Begin blew up the King David Hotel, the British ran home and totally ignored their mandate to defend Palestine.
It does not take courage to massacre unarmed natives in order to steal their land, but evil greed instead.