Too bad. As a non-Muslim your choices are limited. Either revert to Islam, pay the Jizya tax or die. Hamas is a branch of the Muslim Brotherhood, one of the more fanatical branches.
It seems that all you know is the bovine excrement you spout. You are full of it and your behavior is that of an ignorant child throwing a tantrum. The Balfour Declaration read, “”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.”
Which is what they did. They didn’t create the Mandates themselves, they went to the League of Nations, the highest legal international body at the time and proposed the creation of a Mandate for Palestine and several other Mandates as well. Reasonable solutions to maintain the peace following the collapse of the Ottoman Empire and leaving a power vacuum where various regional tribes would fight each other for supremacy and dominance. The League then reified the political structure and asked Britain and France to administer some of the territories. Blame the League if you like but it was a consensus decision of its members.