I do not contest the history of the Jewish state millennia ago, but rather the extrapolation of ownership based on that history. There is abundantly more non-Jewish history from that area.

The Jews go back a few millennia and were well established in the area until about the second century CE.

The levels of violence where escalated by Irgun, Haganah, and the stern Group with the intent of triggering exodus of terrified Palestinian villagers. There are video interviews of men who participated in those events that are terrifying.

No doubt. And efforts by Palestinians to drive out Jews from the area in the 1910's up through the declaration of independence were also terrifying. It was a horrible conflict between two indigenous people that contained militant groups fighting for dominance in the area:

en.wikipedia.org - Arab revolt in Palestine

Which is why partition might have been an effective resolution, but for the actions of Egypt and Jordan (and others) in declaring war and invading.

Since the founding of Israel, it seems that every negotiation/agreement is built with untenable flaws for a Palestinian state, for example, no right for international travel. I full and equal Palestinian state was never offered.

It was offered at the beginning. Had the 1947 division been honored, there would have been a Palestinian state (then-named an "Arab" state) much larger than anything achievable now. And one completely unencumbered by any "untenable flaws." That was the moment, the opportunity. That was destroyed by Egypt and Jordan (and others), who were adamant that there not be Jews in the area and not be a Jewish state. Also that there not be a Palestinian state, since it's not like Jordan or Egypt gave Palestinians their independence while they controlled most of the "Arab" state territories for two decades.

But once it became clear that the surrounding countries were committed to destroying Israel (especially under Nasser's pan-Arabism efforts), and the PLO was committed to its own ethnic cleansing mandate (originally all Jews, then all post-1947 Jews), Israel had an untenable security situation. Every agreement after that had untenable flaws for a Palestinian state, to balance out the untenable security situation Israel had with enemies that were at that time committed not to peaceful coexistence but the destruction and expulsion of the Jews.