Having trouble putting this into words, so I am letting Jeff Jacoby do it for me:

This time, Israeli prewar preparations were much more meticulous. Months were devoted to gathering detailed information on scores of Hamas targets, including training camps and offices, rocket launchers, underground bunkers, weapons-making sites, tunnels from Egypt, and the homes of terrorist commanders. Israel’s military and political operations appear better coordinated than in 2006, and Israeli diplomats are making use of online weapons - a dedicated YouTube channel, for example - to get its message out.

But it remains an open question whether Israel’s leaders have learned the most critical lesson of all: that genocidal jihadists and other mortal foes cannot be wheedled, negotiated, bribed, or ignored into quietude. In a war with enemies like Hezbollah and Hamas and the PLO - enemies explicitly committed to Israel’s destruction - goodwill gestures beget no goodwill, and peace processes do not lead to peace.