The point is that they probably wouldn't know until it is too late. There were no suicide bombers THIS time but there have been plenty in the past and anyone with any sense of self preservation along that border is going to be aware of that and act accordingly when violence is initiated. You make it sound as though Israelis are out there enjoying target practice against helpless Palestinians and I don't think that is the mindset at all. That's what is misleading.
Also, Israel does not currently occupy Gaza and building a fence along a border is not illegal or a very many countries would be breaking that law. That border barrier is directly responsible for a large drop in suicide bombings and other terrorist attacks.
come again?
How many videos would satisfy you?
Satisfy what? Assuming this video represents what it claims to, it clearly isn't representative of the behavior of all Israeli's guarding the border or there would be many more dead. The Israelis' of course claim that Hamas uses people people disguised as civilians and even children to commit terror acts. Are they simply lying? Apparently not: https://en.wikipedia.org/wiki/Child_suicide_bombers_in_the_Israeli%E2%80%93Palestinian_conflict
This wasn't a peaceful protest. Anyone guarding that border is going to be looking at all of those people as potential terrorists or suicide bombers because that's what history has shown. They have legitimate reasons to believe that more such attacks are coming. As bad as the above videos make things look, I wouldn't make a judgement without more context. What was going on before these videos for instance? It's easy to hate people you think want to kill you. Why the shock and outrage that committing violence along the border leads to people being shot? Like I said, tragic but predictable. I'm not trying to justify any one soldiers actions or decision to shoot, just pointing out that the behavior of the Israelis' as a whole is understandable given the circumstances. What is your solution? What exactly is it you think Israel should do?
Go back where they came from maybe? the fence is illegal under international law, as are the settlements, you either have a law for all or for none, which is it you want?
A border fence is not illegal and Israel has not had any settlements in the Gaza strip for a long time. Since 2005. Israel does not occupy Gaza.