Aysenur Ezgi Eygi, a human rights activist, was protesting an illegal West Bank settlement when she was reportedly shot in the head by Israeli soldiers.
Oh wait, she's been dead for over twenty years and the US still hasn't made a stink about her being killed by Israeli occupiers who were literally in the process of stealing Palestinian land.
Further, as others have pointed out, Aysenur Ezgi Eygi isn't even as lucky as Rachel Corrie to have a white sounding name that US citizens might give a shit about. Meaning it's even more likely that Eygi's story will get brushed under the rug and forgotten.
They already "responded" in exactly the way you'd expect:
The White House said it was “deeply disturbed” by the killing of a U.S. citizen and called on Israel to investigate what happened.
The leadership of both parties treat the fascist apartheid regime exactly like they treat American fascists in uniform (cops, in case there was any doubt) murdering people.
The USA allows you to visit anywhere you want, and they maintain a travel advisory list for every country. Both Israel and the West Bank are listed as "High Security Risk", not "Do Not Travel". You can still visit "Do Not Travel" places at mostly your own risk.
The reason given for the advisory is "terrorism and civil unrest". Nowhere in their explanation does it say you will be actively shot at by the acting "defense" force or police.
Hell considering the circumstances, it's probably better to avoid run ins with the IDF, which is the opposite of what the advisory says to do lol.
Is a US citizen protected by the US armed forces if they chose to enter an active warzone as a non-combatant without the consent of the US government?
Doesn't fucking matter. The US doesn't look at national government forces killing American civilians neutrally in any circumstance - except, it seems, in the case of Israel. This isn't some paramilitary or rebel group that killed an American civilian. This is literally the security forces of an 'ally'.