I think this testimony is evidence that there is overwhelming and incontrovertible proof that the IDF attacked the ship, and the US did not come to their aid and covered it up.
What is doesn't answer is why.
The fact that the President of the US recalled planes sent to their rescue indicates this was a political maneuver and not from the Navy, meaning the commander who sent that ship into harms way was not aware of what was about to happen.
But one wonders why the IDF (this can't be a rogue commander since it involved multiple planes from reconnaissance to fighter jets and it involved three ships, so it included IDF intelligence, Air force and Navy and since LBJ was involved we can imagine that it also involved the Prime Minister of Israel) and Israeli political leaders would do this.
In any trial you don't condemn someone before hearing from them first. We have heard from the Prosecutor, now I'd like to hear from the defense attorney.
Ok fair. But to conclude the argument, I think the simplest explanation is the most accurate reason why. Israel wanted USA to enter into the war with the Arabs...and the public typically won't sign off on war unless we are attacked. More specifically, an act of war must be declared by congress.
Recall pearl harbor. USA didn't enter the world war until Japan attack USA. The president had intel it was about to happen and sat on it then too. Need to get the public outraged and ready for war.
Compare it to what's going on now between Israel and Iran. Our own intelligence dept and the independent IAEA say that there's no evidence iran was restarting their nuke weapons program...but that's all you hear from Israel; been hearing that they're just 1 year away from doing it...for 40 years now.
So they sneek attack Iran while in the middle of negotiations with USA, hitting their power plants...and crime against international law because of the potential meltdown by the way.
Iran starts firing back. Israel needs The USA to enter this conflict to win. It's reported that US diplomat to Israel, Mike Huckabee, was in a shouting match with Netanyahu in Israel because he wouldn't allow Americans to flee back to USA before the heavy attacking started. Why not? Everyone else got to leave who wanted to leave.
When 9/11 happened, we received intel from Israel that Iraq was somehow involved and had WMDs. USA went to war and toppled saddam but never found any WMDs...but "coincidentally" Iraq is no longer a problem for Israel.
TL;DR - why? So that USA can be Israel's attack dog.