Please excuse my sarcasm, but it is difficult for many people to understand what the Palestinians have against the Israelis.
In 1948, David Ben-Gurion, born in Płońsk in Poland, and thus not a Palestinian, proclaimed the establishment of the State of Israel. Note that the British, who held Palestine until May 1948, opposed both the creation of a Jewish state and an Arab state in Palestine as well as unlimited immigration of Jewish refugees to the region. It's almost as if Britain knew something would happen.
Now imagine that a member of the Manhattan tribe of native Americans declared New York was their spiritual land of Manhattan and they were taking it as their own. Would Americans have peacefully handed it over? Or if Saxons of Northern Germany declared that London was their spiritual home and moved there en masse? They did try. When their descendants wanted to take Britain, they were met with: "We shall fight on the beaches, we shall fight on the landing grounds, we shall fight in the fields and in the streets, we shall fight in the hills; we shall never surrender." Sounds ominous.
It seems that the locals would have been a little upset.