What does the crisis in Lebanon teach us about Hezbollah? It teaches us the same lesson we learned from Hamas when it took Gaza: Islamic supremacist groups, despite their claims to the contrary, cannot be integrated into states or democratic political systems. We have heard for many years from an array of journalists, scholars, and pundits that Hamas and Hezbollah are complicated social movements that employ violence in the service of their political goals, and that they are therefore susceptible to diplomatic engagement. Such tropes about Hamas have become standard — that there should be a Fatah-Hamas unity government, that Israel should diplomatically engage Hamas, that Hamas’s victory in the Palestinian elections make the group a legitimate political player, etc. — and likewise, similar claims are made about Hezbollah’s role in Lebanon: that it is a legitimate representative of the Shia, that it can be negotiated with, that, like Hamas, the magic elixir of political integration will dissuade Hezbollah from its traditional behavior, which is to terrorize and dominate any system in which it participates. The Hezbollah rampage in Lebanon that we are witnessing should make it obvious to any sentient observer that Hezbollah’s claims to democratic political legitimacy have always been intended only to manipulate the credulous. Participation in politics requires the willingness to persuade your foes, to compromise, to stand down when you don’t get your way. But there is no record of Hamas or Hezbollah ever observing such restrictions...