Help me out here Kul and give me an example of an instance where outsiders come in and claim the land and get a positive reaction from those who were there before them.
Israel got started at first by Jews coming peacefully and buying land. They made prosper what had been worthless which is why it was sold to them.
Arabs, influenced by envy and Naziism, started attacking them.
The Jews, when the failed British withdrew, claimed what had been promised them. Anyone who lived there who wished to stay, could.
Whether the reaction was positive isn't terribly relevant, because the Jews came legitimately, acquired land legitimately, defended themselves legitimately, and trusted a promise from the international community.
Acquisition of property by mutual agreement is a right common to all -- the people didn't have to sell to the Jews, but they did. Self-defense is a right inherent to all -- the people there didn't have to attack.
The choices for the Jews were simple: defend themselves and try to defend a state of their own, or wait to be slaughtered. Anyone who expected different was a fool.
Guilt for the continuing plight of the refugees resides in the Arab capitals where the decisions have been made to do nothing for them, even though they are fellow Arabs (for the most part) and fellow Muslims (which failure, BTW, shows that Islam is a religion neither of peace nor of brotherhood). They keep the situation that way deliberately, so that the terrorists who continue the war of extermination as proxies for those who are too cowardly to do their own work.
Throughout history, lands have been transferred back and forth between states by force. The powerful have drawn lines for others, whether the others liked it or not. And there is part of the problem: all the borders in the Middle East are artificial, a situation bound to create turmoil. That Israel was able to establish borders and make it stick is merely part of that tradition. Yet all they want is peace in the homeland they came from, the only one they have ever had. They invited any residents who would stay to join them, and have provided prosperity for all who did.
Whether they came invited or not, they were originally accepted. But they were made quite unwelcome by people they had no intention of harming.