Because when a nation starts believing its own myths of moral purity, it stops seeing the line between justice and domination. This is a dangerous line to cross.
Israel stole US nuclear secrets to create their own nuclear weapons program, they killed American navy men, they destroyed 90% of the buildings in Gaza and very blatantly committed genocide in the process of doing so, Palestinians prisoners are commonly held without trials or charges i.e. they're hostages. Zionism literally cannot exist without them committing ethnic cleansing because everywhere Israelis live used to be Palestinian properties.
Honestly, what is your point? What are you seeing that the rest of us aren't getting? For the record, my mother's family is mostly Sephardic.
The claims that it was deliberate boil down to "they must have known because there were identifying marks", which can be said about almost any friendly fire incident. In reality, not every operation is executed competently. Plenty of militaries have shot down their own airplanes, for example, despite the existence of several safeguards designed to prevent that.
Alternatively, Israel may well have identified the ship and decided to sink it regardless. The USS Liberty was a SigInt ship that was well-known for monitoring wireless transmissions to hold nations accountable from offshore. Israel, at the time, was engaged in an internationally condemned and illegal military operation in the Golan Heights, and may just as well have sank it consciously to prevent the US from taking leverage of the situation.
We may never know the truth, taking Israel's Military Censor into account.
Your speculation seems a bit farfetched - there's no evidence that intelligence collected by USS Liberty was hurting Israel, and if Israel's goal was to avoid scrutiny, attacking an expensive asset of the world's superpower would have been rather counterproductive.
Israel captured the Golan Heights because it had been used to shell Israeli communities for decades, and that continued even after Syria officially accepted the ceasefire. It would be unreasonable to expect Israel to tolerate that sort of aggression; no capable military would do so.
The started off settlement by legally buying property for wealth (mostly absentee) landlords, who were non-Palestinians (they lived in other part of the Ottoman Empire).
America bought the Louisiana Purchase from France. France never had any meaningful presence in that territory; being incapable of defending the territory should America decide to take it anyway is probably a big part of the reason they decided to accept money for it.
Now my question: having purchased that land from France, did America have a right to eject the native people who lived there? Or did France in fact have no right to sell that land which, in all practical ways, actually belonged to the people who lived there?
Israel "bought" that land from people who had no legitimate ownership of the land in the first place.
The Ottomans had no legitimate right to sell that land out from under the people who actually lived there. The whole premise of Zionism is just one of many cases of European colonialism, and no more legitimate than any of the rest.
If I setup a $10b trust fund to buy up Texan land, I can't unilaterally invade Texas and build my ethnostate on it after I've purchased, say, 6-7% of it. That's the percentage of Palestine the Zionists bought before expelling the indigenous people in the Nakba genocide.
Likewise, if you legally purchase double-digit percentages of Indian, Chinese, Brit, Australian land, it doesn't give you the moral or legal precedent to expel the natives from the rest of their land and declare it your state.