The land of Palestine was part of the Ottoman Empire. After WW2, the victorious WW1 powers divided the Middle East and Britain got a mandate over Palestine and control of Jordan and Iraq. France got Lebanon and Syria etc. After the founding of Israel and subsequent victory of the Jews against the Arabs, Jordan grabbed the West Bank and Egypt grabbed Gaza. Both areas were occupied by Israel after the 1967 six day war.
Palestinians have lived in Palestine for at least 2000 years or more. If people from India takes over Laos today just because their vedas said Laos was part of a great Hindu Empire 2000 years ago, would you accept that?
Iran's actions today are a reaction to the misdeeds the West inflicted on it.
Back in the early 50s, Iran had a functioning democracy. When the democratically elected Iranian President, Mossadegh, asked British Petroleum to pay more royalties or get nationalized, he was overthrown in a coup by the future Shah of Iran supported by the CIA. The Shah was a brutal dictator.
Then came the Iran-Iraq war, as the West supported Saddam with weapons and intelligence. Almost a million Iranians died in that war.
Despite the negative press on Iran, Iran actually has a far more open system than Saudi Arabia, where at least there is some sort of democarcy in Tehran and Iranian women enjoy more rights than Wahhabhist Saudi Arabia.
Iran's bluffing against the West and Israel plays well to Iranian ears, given the injustices they have suffered. And given the rhetoric about regime change, Iran is entirely justified to have the bomb to protect itself. It also keeps Israel honest about its intentions. As I said, Iran will not nuke Israel, as it will contaminate and damage the Holy Land. I use to be very pro-Israel, but I have a more open mind now, being able to see objectivel from all viewpoints.
I entirely support Iran having the bomb, and I wish them great success to get that operational as soon as possible.