Smooth landing not guaranteed.

Barack Obama’s team recently took credit for improving the “tranquility of the global community,” and the president made it clear just what a calm place the world has become during his tenure.

But this summer Obama’s tranquil world has descended into medieval barbarism in a way scarcely seen in decades. In Gaza, Hamas is banking its missile arsenal in mosques, schools and private homes; even Hitler did not do that with his V2s. Hamas terrorists resort to trying to wire up animals to serve as suicide bombers. Aztec-style, they seek to capture Israeli soldiers to  torture or trade — a sort of updated version of parading captive soldiers up the Templo Mayor in Tenochtitlan.

Hamas cannot build a hotel, but instead applies its premodern cunning to tunneling and killing in ever more insidious ways. Yet it proves incompetent in doing what it wishes to do best — kill Jewish civilians. Its efforts to kill Jews while getting killed in the process earn it sympathy from the morally obtuse of the contemporary world who would have applauded Hitler in 1945 as an underdog who suffered greatly as he was overwhelmed by the Allies that he once tried to destroy.

In Paris, just seventy years after the Holocaust, sympathetic rioters hit the streets to cheer on Hamas’s efforts to kill more Jews with their crude versions of Vergeltungswaffen. The passive French solution apparently is once again to encourage Jews to leave the country, given the growing number of new Nazis in their midst. Whether Hamas or Putin, the European response is always the same: why cannot they just go away to bother to some Jews or Americans, and leave us alone?

Russian operatives, role-playing as Ukrainian separatists, shot down a civilian airliner, then tried to doctor the debris field, then let the bodies decay, and now are looting the wallets of the dead. You cannot get much less tranquil than that.

In Iraq, ISIS, not content with the usual Middle East savagery, resorts to warring on religious  icons, as if torture and murder of the living do not offer enough outlet for their barbarity. They blow up mosques, shatter tombs, and deface graveyards, in their eagerness to restore the 7th century. All that seems more Dark Age than merely medieval.

Iran just missed our “deadline” that was supposed to result in fewer centrifuges in exchange for suspending the sanctions. No sane person now believes that the Iranians will stop nuclear enrichment, or will not get a bomb, or will not threaten to use it when they get one. What will Secretary Kerry do, now that the currency of “red lines,” “deadlines” and “step-over lines” has been all used up?