UNESCO (the United Nations Educational Scientific and Cultural Organisation) has a General Assembly, which is distinct from the UN General Assembly. For UNESCO's General Assembly to admit Palestine to membership would not mean that it had full U&N membership.

The same will apply when the UN General Assembly does the same - that won't happen until the Security Council votes for it, which the USA has said it will block with its veto, whatever the other members want, so long as Israel is opposed.

It's all very silly.