There has to be some extremely solid and independently verified evidence to clear Israel from this. They might cry that they are being falsily accused, but what can you expect when you carry on with rhetoric atleast on par with Hamas and ISIS from officials/ministers during this retaliation phase. "Animals", "no innocent Palestinians" etc. Even the biggest defensive argument of "they have nothing to gain but all to lose" doesn't really hold up strong either, considering they're not willing to take on any criticism/condemnation onboard anyway.