Jews do not fly for free to Israel from the perspective of the airline companies. There are some Rabbis who philanthropically grant free trips to Jews to visit Israel. However, this is a private endeavor.If the Christians wanted to put together similar associations or subsidies for Christians to visit Israel, that is entirely their prerogative.
For the reasons why people hate Jews and Israel, please see the Related Question below (so that they need not be repeated here). As specifically concerns the United Nations, people that hate the Jews and Israel hate that the United Nations was responsible for granting Jews permission to declare the State of Israel.
Some Jews live in Israel.
Many Jews consider Israel to be their homeland.
Here are some differences. Please add to this list:Jews in Israel speak fluent Hebrew. Jews outside of Israel use Hebrew in prayers, but generally do not know how to speak it.Orthodox and Conservative Jews outside Israel observe some holidays for 1 extra day.Secular Jew in Israel observe Jewish holidays and some customs. Many (but not all) secular Jews outside Israel observe nothing.
The Jewish home is considered to be Israel. All Jews are welcome there, and some Jews think that all Jews should live in Israel.
There are some Christians in Israel who do celebrate Easter, but the Jews and Moslems in Israel do not celebrate it.
Due to its policy of building walls to keep the non-jews away from the jews, some people call it "Apartheid Israel".
No Jews the pyramids were built long before Israel
A very small percentage of Jews in Israel are choosing to not circumcise their sons because of the nature of secularism in Israel. Many secular Jews in Israel are militantly so and a percentage of these people refuse to participate in any Jewish rituals whatsoever.
Israel is the homeland of the Jewish people. It is the land that the Jews originally came from. Some Jews believe the land was promised to the Jews by God. Others believe a history of thousands of years binds the land to the people.
Some of them became Messianic Jews.