Ulster has an "imperfect peace." And why, the Sinn Fein made concessions. The Palestinians were offered all of Gaza, 95% of the West Bank, and joint sovereignty over Jerusalem. They rejected it and launched the Intifada. Your "lessons" only teach us that Palestinians, unlike northern Irish, only aspire to peace with the existence of Israel.
Turkish jets take part in U.S.-led coalition strikes against ISIS for first time (Reuters)
from the article: Report: Mossad used Australian passports before Dubai row