If Hamas was building gas chambers and ovens for the Jews, would the world still tell Israel to show restraint and go quietly to the slaughter?

http://www.barenakedislam.com/2014/07/30/if-hamas-was-building-gas-chambers-and-ovens-for-the-jews-would-the-world-still-tell-israel-to-show-restraint-and-go-quietly-to-the-slaughter/