What right did Britin have ?

here is George Galloway talking about how the Brits gave Israel Palestinian territories. Many Jewish sympathizers claim Mr. Galloway is an “Apologists” whatever that means,  but i do agree with him. What right did Britain have to grant someone else country ?

Plz listin to it and tell me what you think ?

httpv://www.youtube.com/watch?v=BPlqd3N0LbU

Here is the same one with arabic translation

httpv://www.youtube.com/watch?v=xD65oBsTJsM#!