"...A European Mandate issued to ensure violence between Jew and Arab in Palestine by filling Palestine with tens of thousands of European Jews at the expense of Arabs who had lived on the land for generations..."
Just kicking out the Arabs who had, earlier, kicked-out others. Karma's a bitch, and it's the Arabs turn in the barrel.
"...Why are Jews alone, among all nations of the world, entitled to land their ancestors conquered thousands of years ago?"
Because...
1. we like Jews better than Muslims?
2. the Jews held themselves together for 2000 years in anticipation of retaking it?
3. the Jews are more industrious and can do much more with the land?
4. the Jews are tougher and smarter and better warriors than the surrounding Muslims?
5. Judaism is the Spiritual Mothership of Christianity; Islam is a late-arriving, untrustworthy knock-off; so we side with the Jews?
6. we like Jews better than Muslims?
...to name a few reasons.
Now, tell us where Palestinians come from?
"The Palestinian people (Arabic: الشعب الفلسطيني*, ash-sha‘b al-Filasṭīnī

, also referred to as Palestinians (Arabic: الفلسطينيون*, al-Filasṭīniyyūn, Hebrew: הפלסטינים*), are the modern descendants of the peoples who have lived in Palestine over the centuries, and who today are largely culturally and linguistically Arab due to Arabization of the region."
Palestinian people - Wikipedia, the free encyclopedia
According to real history they are recent arrivals and have lived there for at most 150 years, while the Jews can show 3,500 years of habitation on the land. Here are the words of just one of the many muslims fighting to destroy Israel
Palestinian Myths
Why is it that on June 4th 1967 I was a Jordanian and overnight I became a Palestinian?”
“We did not particularly mind Jordanian rule. The teaching of the destruction of Israel was a definite part of the curriculum, but we considered ourselves Jordanian until the Jews returned to Jerusalem. Then all of the sudden we were Palestinians - they removed the star from the Jordanian flag and all at once we had a Palestinian flag”.
“When I finally realized the lies and myths I was taught, it is my duty as a righteous person to speak out”.
The present-day "Palestinians" are an Arab people, with Arab culture, Arabic language and Arab history. They have their own Arab states from where they came into the Land of Israel about one century ago to contrast the Jewish immigration. That is the historical truth. They were Jordanians (another recent British invention, as there has never been any people known as "Jordanians"), and after the Six-Day War in which Israel utterly defeated the coalition of nine Arab states and took legitimate possession of Judea and Samaria, the Arab dwellers in those regions underwent a kind of anthropological miracle and discovered that they were Palestinians - something they did not know the day before. Of course, these people having a new identity had to build themselves a history, namely, had to steal some others' history, and the only way that the victims of the theft would not complain is if those victims do no longer exist. Therefore, the Palestinian leaders claimed two contradictory lineages from ancient peoples that inhabited in the Land of Israel: the Canaanites and the Philistines. Let us consider both of them before going on with the Palestinian issue.
How long do "Palestinians" live in "Palestine"?
According to the United Nations weird standards, any person that spent TWO YEARS (!!!) in "Palestine" before 1948, with or without proof, is a "Palestinian", as well as all the descendants of that person. Indeed, the PLO leaders eagerly demand the "right" of all Palestinians to come back to the land that they occupied before June 1967 c.e., but utterly reject to return back to the land where they lived only 50 years before, namely, in 1917 c.e. Why? Because if they agree to do so, they have to settle back in Iraq, Syria, Arabia, Libya, Egypt... and only a handful Arabs would remain in Israel (by Israel is intended the whole Land between the Yarden River and the Mediterranean Sea, plus the Golan region). It is thoroughly documented that the first inhabitants of Eretz Yisrael after some centuries were the Jewish pioneers, and not the Arabs so-called Palestinians. Some eyewitnesses have written their memories about the Land before the Jewish immigration:
Besides them, many Arab sources confirm the fact that the Holy Land was still Jewish by population and culture in spite of the Diaspora:
·In 985 c.e. the Arab writer Muqaddasi complained that in Jerusalem the large majority of the population were Jewish, and said that "the mosque is empty of worshippers..." .
·Ibn Khaldun, one of the most creditable Arab historians, in 1377 c.e. wrote:
"Jewish sovereignty in the Land of Israel extended over 1400 years... It was the Jews who implanted the culture and customs of the permanent settlement".
After 300 years of Arab rule in the Holy Land, Ibn Khaldun attested that Jewish culture and traditions were still dominant. By that time there was still no evidence of "Palestinian" roots or culture .
If the historic documents, comments written by eyewitnesses and declarations by the most authoritative Arab scholars are still not enough, let us quote the most important source for muslim Arabs:
"And thereafter We [Allah] said to the Children of Israel: 'Dwell securely in the Promised Land. And when the last warning will come to pass, we will gather you together in a mingled crowd'.".
- Qur'an 17:104 -
Any sincere muslim must recognize the Land they call "Palestine" as the Jewish Homeland, according to the book considered by muslims to be the most sacred word and Allah's ultimate revelation.