This is a question of indigenous people being subjected to genocide, ethnic cleansing, and subjugation at the hands of a foreign occupying power. This was even the case back when Britain was telling the Palestinians what to do. The Palestinians have every right to hate the powers that occupy and commit genocide and ethnic cleansing on them. They are not in any way obligated to submit to anything that is imposed on them by any occupying power, neither the British prior to the establishment of the state of Israel, nor the Israelis.

It is the responsibility of the aggressors (in this case Israel) to show the people they have victimized and oppressed for more than sixty years that they are willing to change. Hamas has a right to not submit to Israeli subjugation. When Israel shows by its actions, that it is willing to let the Palestinians remain in their place of origin, and undo the more than sixty decades of showing them through their actions that they intend to wipe the Palestinians off the face of the map, that is when I would expect Hamas to change its charter. Not before.