The Israeli-Palestinian conflict worsened today as Hamas launched more missiles into Israel, including one long-range rocket aimed at Tel Aviv. Israel responded by calling up more reserves and striking back at the terrorist launching points. But while the world reproaches both sides today President Obama reminded us why he deserves a good deal of the blame for the mess.

Obama has largely held himself aloof from the conflict in recent weeks other than warning Israel to show “restraint” in response to both terror attacks and a missile barrage on its territory. But he did choose to contribute an op-ed to the left-wing Israeli newspaper Haaretz today as part of its “Israel Conference on Peace” in which he extolled the two-state solution and declared “peace is the only true path to security for Israel and the Palestinians.”

Despite the boost from the president and the appearance of Israeli President Shimon Peres, the Haaretz conference will be probably best remembered for proving just how intolerant the left can be. To his credit, Economy Minister Naftali Bennett accepted an invitation to speak to the forum but the leader of the right-wing Jewish Home Party was repeatedly interrupted by insults from the crowd of peaceniks calling him a “murderer” and “fascist.” As the Jerusalem Post reports (Haaretz has yet to file a story on the incident on its website), when he concluded his effort “dozens of people” stormed toward him. While the minister’s bodyguards fended off most of the attackers, one managed to get close enough to punch him in the back before he was whisked away. This is yet another reminder that for the left, especially the Israeli left, tolerance for opposing views is not consistent with their idea of democracy.

But despite these histrionics, Obama’s op-ed provided Israelis with a timely statement of how destructive U.S. policy has been. In the piece, Obama did extol the U.S.-Israel relationship in the same laudatory terms he used during his 2013 trip to the Jewish state. But he also went out of his way to praise Palestinian Authority leader Mahmoud Abbas as a peace partner while pointedly offering no kind words for Israeli Prime Minister Netanyahu. Even more tellingly, especially in the midst of a crisis provoked by a Hamas terror attack and prolonged by the Islamist group’s missile fire from Gaza, he also ignored the role that the Fatah-Hamas unity pact had played in torpedoing peace talks this spring and inspiring the current round of violence.

This is consistent with U.S. policy on Hamas in the months since Abbas embraced his erstwhile Islamist rivals. Though the PA government is now hopelessly compromised by the deal with Hamas, the U.S. has decided to pretend as if Abbas’s decision to make peace with the terror group rather than with Israel has no meaning or consequences. The administration blatantly violated U.S. law by continuing to funnel aid to the Palestinians in spite of provisions that prohibit such transfers in the event of Hamas participation in the PA. It has also made it clear that it believes Israel should treat Abbas’s new coalition as a viable partner in spite of Hamas’s refusal to adhere to the terms of mutual recognition and commitment to peace that Obama repeats in his op-ed.

What has this to do with the current violence? Everything.

Hamas’s decision to escalate the fight with Israel, both by sanctioning the kidnapping and murder of three Israeli teens and the subsequent missile attacks, is directly related to its belief that the unity pact marked a turning point in its long struggle with Abbas’s Fatah. Though Hamas was forced to make a deal with Fatah in large measure because of its cash shortages and isolation after its break with Iran and the fall of Egypt’s Muslim Brotherhood government, it has revived its political fortunes by reverting to violence. If Hamas is allowed to stay in the PA without penalty and Israel is constrained by American demands for “restraint” from the sort of military offensive that will truly make the group pay a heavy price for its behavior, then its prospects for eventual victory over Abbas are improved.

The slide into what may be another intifada or at least another round of fighting in Gaza is blamed on Netanyahu’s supposedly belligerent attitude. But this is exactly what many observers feared would be the inevitable aftermath to another failed U.S. peace initiative. Secretary of State John Kerry’s peace talks were acclaimed as a noble effort even if the odds were always against success. But by raising the stakes in the region at a point when everyone knew the Palestinian leadership was unready for peace, he set the stage for a chance for Hamas to interject itself into the process in this manner.

Even worse, by deciding to treat the Fatah-Hamas pact as no big deal, the U.S. sent exactly the wrong signal to both Abbas and Hamas. While Abbas was allowed to think there would be no price to pay for abandoning the peace process and embracing unreconstructed terrorists, Hamas soon realized that it could literally get away with murder without the U.S. blinking an eye or rethinking its determination to restrain Israeli efforts to deal with the terror group. The result is the current escalation that has damaged Abbas while allowing the Islamists to reclaim their status as the address for “resistance” against Israel.

Barack Obama may not have wanted the current fighting to happen and, indeed, he would very much like it to stop. But the administration’s maneuvering led inevitably to another blowup that had the ironic effect of weakening Abbas, the one figure in this mess the president actually likes.

America’s mixed messages are not the sole reason why the situation has deteriorated but they have played an outsize role in making things worse. If the president really wants to advance the cause of peace, he should forget about more bland pronouncements such as his op-ed, and start reminding both Abbas and Hamas that they will suffer if they don’t embrace the cost of peace. Anything short of that is a continuation of a policy that is exacerbating the conflict rather than solving it.