As far as i know Israel is fully responsible for the hundreds of settlements in the territories and East-Jerusalem. Who's to blame here ? this is not a 'defensive war', this is territorial expansion using military force against unarmed populations. Israel is 100% responsible for her acts.
U.S., allies conduct 1 air strike in Syria and 11 in Iraq against ISIS militants (Reuters)
from the article: Abbas says prefers talks with Israel over UN vote on Palestinian state