Palestine has been recognized by the UN, not as a member, but still a state. They have every right to join international organisations. The excuse that it disturbes negotiations is not valid: Israel has never asked permission from the Pals to joint international bodies like OECD. You undermine the international system of law as such if you declare that certain states have no access to it. .
Russia is not and will not launch infantry operations in Syria, says senior lawmaker (Reuters)
from the article: Kerry cancels Mideast visit after Palestinians renew UN bid