I despise the July 14 Vienna deal because it could do incalculable damage to the United States and its allies. That said, I find a tiny silver lining in the possibility that it could, if everything goes just right, end up hurting the Iranian regime more than its enemies. The drawbacks of the Joint Comprehensive Plan of Action are so numerous that listing them requires more space than the 159-page treaty itself. In brief, it offers the tyrants in Tehran more money, more legitimacy, more arms, and an approved path to nuclear weaponry over the next 10 to 15 years. As a Jerusalem Center for Public Affairs analysis says: "The agreement unilaterally and unconditionally grants Iran everything it has been seeking without any viable quid pro quo." To make matters worse, the deal includes no provisions that Tehran stop supporting violent groups, end its aggressive plans to conquer neighbors, eliminate the Jewish state, or deploy an electromagnetic pulse weapon against the United States. Indeed, so confident are the mullahs of their position, they never paused from expressing these bellicose intentions and insist that Americans remain their enemies. The country's tyrant, Supreme Leader Ali Khamenei, even published a book during the negotiations about destroying Israel. In short, the deal makes war with Iran more likely. For its part, the Obama administration shamefully dissembled about the terms of the treaty, used underhanded methods to pass it through congress, and became both lawyer and spin doctor for Khamenei. For these reasons, I am appalled by the congressional Democrats who sheep-like went with President Barack Obama's folly, I join the two-thirds of the American public that rejects the Iran deal, and I tremble at what catastrophes the deal might bring. As for that tiny silver lining: Assuming that the Iranian leadership does not deploy its shiny new nuclear weaponry, the deal could end up undermining it, and for two reasons. First, greater contact with the outside world and a higher standard of living might erode the regime's stability. The Soviet Union and other examples suggest that the more the subjects of a totalitarian system know and compare themselves to the outside world, the more dissatisfied they become with the existing ideological and tyrannical order. (There's a reason North Korea's population is kept so isolated.) Changes have already started in Iran: Expectations are "ballooning" for more prosperity and more freedom, reports Saeid Jafari an Iranian journalist. "With Iran's recent nuclear deal with six world powers, many young Iranians are hoping for better days," he writes. And it's not just the youth: "Depending on the strata, there is different emphasis on contentious matters such as foreign investment, Iran's relations with the world and the cultural, social and political atmosphere at home." Also, just about everyone demands a stronger currency. The regime resists making changes, however. It rejects new political parties and arrests merchants who sell clothing with the American flag. So much for freedom. It maintains a "resistance economy," meaning a domestic capacity so as to reduce vulnerability to sanctions and not depend on the outside world. So much for consumerism. President Hassan Rouhani, who is closely associated with the nuclear deal, has tried to head off expectations by warning that the road ahead will be long and painful: "We can import painkillers immediately after the sanctions are removed by spending the unfrozen funds on cheap imports. We can also use our resources for investment in the manufacturing, agriculture, and services sectors. We opt for the latter." Second, as Stephen Sestanovich of Columbia University argued in a brilliant 1993 article explaining the collapse of the Soviet Union, the West's giveaways in the detente process destabilized the Soviet regime, even though these concessions allowed "the realization of all major Soviet military and diplomatic desiderata" -- rather like the Iran deal today. "The infuriatingly inconsistent West turned out to be an opponent that Soviet communism simply could not understand, much less subdue. In the end, the democratic weakness that so many bemoaned may actually have helped to bring victory in reach," he wrote. Like the Soviet dictators, the Iranian rulers may also be undermined by Western inconsistencies and changes. This possibility does not reduce my vehement opposition to the Iran deal. But it does add meager hope of long-term benefit, a goal that American, Israeli, Gulf Arab, and other strategists should now exploit to the maximum. Daniel Pipes is president of the Middle East Forum.