I had to look up just how/when did Britain “set the Jews free”, as it says in this poster, and I think they are referring to the Balfour Declaration of 1917 where Britain formally endorsed the creation of a Jewish homeland in Palestine. However, the actual text of the Declaration also protected the civil and religious rights of the Palestinians – something the Israelis did not live up to:
His Majesty’s government view with favour the establishment in Palestine of a national home for the Jewish people, and will use their best endeavours to facilitate the achievement of this object, it being clearly understood that nothing shall be done which may prejudice the civil and religious rights of existing non-Jewish communities in Palestine, or the rights and political status enjoyed by Jews in any other country,
MATTHEW'S ISLAND 