Sure there is.......when they were warned, when they then CHOSE to ILLEGALLY cross into another country's territory. And what they are protesting is largely a moot point. The land is Israel's, just as much, if not more than California is the U.S.'s. Sure, they could have used lesser force, but the force used DEFINATELY makes further mass illegal crossing a little less likely.
Minus yours & Bt's opinion of over-reaction vs merely using more force than they could have, though still justified, the truth is the truth. Sorry, if that rubs some folks the wrong way