The Israelis weren't snipers.
It seems you missed the guy's sniper rifle or that he got shot AFTER shooting himself.
I have a sniper rifle. A "sniper rifle" does not a sniper make. AFAICT from the video, he was a guard with a scoped rifle.
AFAICT, they were posted in a guard tower. They didn't have the option of moving.
We do not know if they did not have an option to move. If they did, they should have.
Sure: if they did, they should have. We can't tell if they did. The position looks like an assigned post rather than a sniper hide; for starters, as Bogie implicitly noticed, they were leaning out the window to shoot. They should have been 10' back all along.
Either way, the entire thing was a big screw-up, ergo the title of the thread.
It does look like someone screwed up somewhere, but there isn't enough information to say where.
--Len.