No one asked Serbia if she consented to the independence of Kosovo.
Perhaps any Palestinian Declaration of Independence should not come from those who seek to keep alive the age-old civilisation of Christians, Muslims, Jews and Druze, with Arabic as its lingua franca and with its de facto capital at Damascus, on which a body blow was inflicted in 1948?
Perhaps it needs to come, not even from Hamas, but from those, and they certainly do exist, who vilify Hamas for having sold out, and who instead seek a far more hardline Islamist regime (no Saudi-style votes for women here) bedecked with the paraphernalia of Nazism and engaged in the genocide of anyone who does not share that vision?
Perhaps it needs to come from those whose Declaration could be relied upon to be denounced by the Christian, Muslim, and Arab-nationalist leaders within Israel's pre-1967 borders, just as the Kosovan UDI was, and continues to be, denounced by the Muslim, Albanian, Catholic, Jewish and Gypsy leaders in Serbia?
The United Nations, the United States, the United Kingdom, the European Union, NATO, and all the rest of them would then be fully supportive, up to and including the promise of armed force if necessary. Wouldn't they? If not, why not?