Why would Israel have shot-up a United States Navy ship?
What possible advantage would that have brought to Israel?
Other than pissing off the most powerful nation on the face of the planet.
The only nation that could quickly replenish the munitions the IDF was firing-off in 1967.
I have heard it said that the Israelis fired upon the USS Liberty intentionally, in order to warn-off other US ships, and to discourage them from electronically snooping off Israel's shoreline.
I have heard it said that the Israelis fired upon the USS Liberty intentionally, in order to preven tthe US from giving wartime intel to the Arabs as it sat offshore.
Neither of those reasons make any sense to me.
In 1967, the US and Israel had not yet cemented their relationship, and Israel was still obtaining much of its weaponry from France and the rest of Europe, and some US arms through third-party brokers around the world, as well as a little here-and-there from the US itself.
But, by then, the surrounding Arab states were all either Soviet client-states or buddy-buddy with the Russians, with most of them receiving copious weaponry from the Soviets, and all Israel had was France, and some small-time operators, with a little diplomatic cover from the US et al, to offset the massive weaponry being donated to her enemies.
Under such circumstances, Israel's best hope was to create and cement a much better relationship with the US, and ask the US to become its 'sugar daddy' for weaponry, but they were still working on that relationship, and it had not yet been locked-down, if memory serves correctly, at the time of the USS Liberty incident.
I am entirely willing to concede that some aspects of this prolonged attack sequence sound damned fishy to me... re: flags being run-up, target identification, etc., but against those eyebrow-raisers is the main question...
"What did Israel stand to gain by intentionally firing upon the USS Liberty, at a time when it needed every friend that it could lay its hands on, especially a superpower whom it was hoping to latch onto as a weapons sugar-daddy?"
I confess to being totally perplexed and confused by the whole damned thing.
But, at a distance of 47 years, I don't think we're likely to see any renewed investigation, nor are we likely to have access to all the key players and key information that one would need, in order to do a decent job of it.
It's a puzzler, alright.
I'm an American, first, and a supporter of Israel, second.
My first loyalty is to my own country and to my own countrymen.
But I just don't see why our friends over there would have done such a thing on purpose.