Answer 1
In the olden days of 1364, Palestine was a large nation of Jordan, Syria and Israel. Then Israel ran away which made the Palestinians unhappy. 500 years later the Israelis were treated very badly and needed a place to stay, so the Palestinians let them stay with them. Little did they know, Israelis would flood into their land and have the UN on their side, which allowed them to become a free nation in 1948. So basically the Palestinians were unhappy because they had to share their land.
Answer 2
Palestinian Arabs ... particularly those who don't live in Israel ... are unhappy with Israel largely because the entire concept of a Jewish country in that otherwise totally Muslim region is unacceptable to them. Had there been any whose resolve on the matter might have wavered during the past 60 or 70 years, government policy, government Propaganda, and the educational system have united to firm it up.
Answer 3
The Palestinians were initially unhappy with the State of Israel because they believed that the land that had physically belonged to their parents and grandparents should have been there's for inheritance. In their minds, it did not make sense that a group of German, Polish, French, English, and Russian speaking people should claim land that their ancestors had not even visited for centuries. Even by the time of Israel's Declaration of Statehood, less than half of the land within the UN proscribed borders of Resolution 181 was owned by Jews. Therefore, the idea of Jewish State being even more physically expansive than the land already taken was alarming.
During the Jewish-Arab engagement (the term is nebulous because it was a conflict fought by militias as opposed to proper armies) of 1947-1949, both Arab and Jewish soldiers committed acts against civilians and tried to assist in the removal of the "undesirable party". This resulted in numerous Palestinian towns being attacked, rapes occurring, and murders on numerous occasions. Fear of further attacks and incitement by Arab Mullahs drove many Palestinians away from their homes. After the conflict, Israel, in order to maintain its Jewish character, has not permitted any Palestinian refugee to reclaim land inside of Israel. Palestinians are very angry both at the Jewish malfeasance during the Jewish-Arab engagement and the continuing lack of their Right to Return or (although less desirable to most Palestinians) compensation for their lost property.
Those Palestinians who did not flee were naturalized as Israeli citizens, but they shoulder a lot of hurt over the Israeli actions in the Jewish-Arab Engagement. In addition, they feel (similar to the Blacks in the United States) that even though they have equality on paper and politicians who represent their interests, there is a clear prejudice against them in the job market, housing market, and as concerns education. A famous example was how on Jerusalem's 40th reunification anniversary, there were massive rainstorms and badly constructed Arab sewers of East Jerusalem which had not been modified since Jordan controlled the region flooded up and out of many people's toilets. The same did not happen in the Jewish neighborhoods which did have more modern construction. This angers a number of Israeli Arabs who self-identify as Palestinians.
Finally, Palestinians are angry with Israeli treatment of the Palestinian Territories, namely the blockade/starvation of Gaza and the direct military occupation of the West Bank. These military activities prevent Palestinian self-realization and governance. Furthermore, the military occupation of the West Bank is accompanied by a proliferation of settlements (economically incentivized by the Israeli government) and illegal settlements (by lack of Israeli governmental opposition to such moves). This is seen by many Palestinians as a Jewish land-grab and a denial of their Right to a State as well.
Note: This is not to say that even if all of these grievances were atoned for in some way or another that Palestinians would suddenly accept Israel as there are numerous Palestinians and Arabs who have vowed to never accept Israel as a valid state for many different reasons. However, the above are the most prevalent and common grievances cited by Palestinians concerning Israeli treatment.
It might have something to do with the fact that they are stateless refugees who are tormented by their militant, terroristic, and Islamist rulers on the one hand, Israel on the other, and other Arab States and Iran on the third, all of whom use the Palestinians as pawns in a regional political game of one-ups-manship.
Israel took land from Palestine. The US helped Israel do that by supplying weapons.
The British took a large part of their land and called it Israel for Jewish people to live in. The Palestinians didn't have any say, and the Jewish people hadn't lived there for a long time. This isn't a dating question :) Many Palestinians lost their homes and land when the state of Israel was formed. This is the main reason they are upset. There are several UN resolutions aimed at getting Israel to compensate the Palestinians, but so far they have not been enforced by the global community.
Israel is building housing for Israeli citizens in East Jerusalem and the West Bank in contravention of international law.
Most Palestinians are Sunni Muslims with a minority of Christians.
trick question!there are no ancient Palestinians!
Oh no palestinians are not descendants of Abraham.
Medical Aid for Palestinians was created in 1984.
Yes, most Palestinians are Muslim. Many are Christian too.
No. It is very rare, but the probability increases if you talking about Arab Israelis and Palestinians (as opposed to Jewish Israelis and Palestinians).
what is the reason and country/origin of palestinians
Jews and Palestinians.
It began with the religious conflicts where Palestinians were not ready for peace.
Palestinians are a Middle Eastern/Semitic people originating from the Eastern Mediterranean who have been Islamized and Arabized.