The most cherished concept in Israel is their "deterrence". Israel wants to deter any protestors, critics, or attackers of any sort so others do not follow their example. This is normally done by killing a few. This is how Israel got a reputation for "disproportionate response" which was all the raqge a few years ago. Killing a bunch of Palestinian civilians never had the desired effect of making Hamas afraid to attack Israel. It hasn't had the desired effect against protestors either, even though enough have been killed. The highest profile case was when an Israeli bulldozer crushed Rachel Correy, a young American woman protesting Israels destruction of Palestinian homes. Anyway, this stuff has been going on for years and Israel has always gotten away with it. The message they want to send is, if you don't want to die, then don't protest our policies. America, as usual is Israel consenting silent partner in this murderous enterprise. Israel message to American politicians? Shut up and keep the weapons coming.
from the article: IDF to probe death of Palestinian protester at West Bank rally