how many terrorist attacks were prevented by pre-emptive arrests

KNOWS! had it not been 4 the fence,hundreds of Innocent Israelis would have been blown up by now.Also,it has saved Palestinian Lives too-Suicide Bombers,but also the ones that would get caught up in Israel's Retaliation! Yet the World go on and on,what Logic is there to their Protests?Simply they are looking to create any thing negative,so long they can throw some dirt at this Jewish Nation!