History. British didn’t bail. Mandate became redundant with the end of the LoN. The UN was the new entity and America bribed and bullied nations to pass Partition. Well documented!
Partition created the warfare. None before.
Bizarre as it may seem folk generally don’t like giving away half their land to foreigners.
And Israel had the greater numbers in 1948. Better weaponry ever since and America bribing the neighbours ever since to behave. America spends as much on Israel’s security as Israel generates in tax revenue.
Education! Please embrace it. And that is why you are an IgnorantFookin’Twat!