"It is not really theirs, but has just been occupied since the 67 war."
I agree with this statement in some ways and disagree with it in others.
I agree that Gaza and the West Bank are not Israel's (except Jerusalem). But the '67 war has nothing to do with why these territories are not Israel's.
Growing up in Germany I regarded it as legitimate if a country that was being attacked and then war the war keeps a part of the attacking country and even expels its population. This is what happened to Prussia, Pommerania, and Silesia. I still regard it as legitimate. I believe that without a risk of losing something valuable, there is not much that could prevent one country from attacking another. The idea of losing land to another country doesn't shock me. But what did shock me was that this principle apparently did not apply to Israel.
But I don't care. I believe that Transjordan and Egypt lost the territories to Israel and that the process was legitimate.
The ONLY reason, for me, to consider an alternative outcome is the fact that the territories were meant to be Palestinian and that Egypt and Transjordan took them away from the Palestinians. And the ONLY reason, for me, to now consider these territories Palestinian is because Israel has agreed to eventually make these territories a Palestinian state.
And I support a Palestinian state for three reasons:
1. When the Ottoman Empire was divided, Palestine was eventually divided into a Jewish state (Israel) and an Arab state (Palestine). (Again, the Ottoman Empire was one of the attackers and lost territory.) Thus both Israel and Palestine have a right to exist based on the same incident. But when Israel managed to defend itself against pan-Arabist attacks, Palestine was occupied by the pan-Arabist forces.
2. I'd rather have a Palestinian people than an Arab nation. Huge nations based on a common bloodline tend to be dangerous for the rest of the world. Smaller nations tend not to be. And why should a people not have their own country?
3. The pan-Arabists and pan-Islamists have done everything they can to avoid formation of a Palestinian state. When Palestine was divided in Jewish and Arab parts, the Arabs didn't accept the division, when the Arabs controlled the territories, they did not create an independent Palestine in it, and now the terrorists try to stop the peace process and thus again avoid formation of a Palestinian state. Out of spite and following some logic it thus seems clear to me that formation of a Palestinian state should be something an enemy of pan-Arabism wants to support.