It is true that in the hands of dictators or terrorists groups, nuclear weapons endanger peace and other nations. A policy of nonproliferation pointedly directed at dictatorships such as Iran, North Korea, and Syria is wise and momentous. However, for Obama, Europe, and the UN, the goal of nonproliferation applies generally to all nations, including democracies. This is the asinine fruit of soft political realism. Historically, realism in foreign policy assumes all nations, including democracies, are driven by the lust for power. Developing and maintaining stable power balances are then the diplomacy of international politics, and peacekeeping.
Democracies, however, rely on their nukes for protection, mainly to deter attacks on them. During the Cold War, the U.S declared that a nuclear counterstrike would meet any nuclear attack on the U.S. or Europe. This kept the peace. Without American nukes, the Soviet Union might well have invaded Europe leading to World War III. Or conflicts elsewhere, as in Korea, Vietnam, or China could have also led to global war
All the nuclear powers, U.S, UK, USSR, France, USSR, China, Iindia, and yes, even Pakistan, mindful of the consequences of a nuclear war, walked on eggs in their conflicts. Their claws were generally retracted in a serious crisis, or even a limited war, such as over Cuba, Berlin, Bosnia, Iraq, or Afghanistan. The sheer horror of nuclear war kept the larger peace.
Next, consider democratic Israel’s 200+ nuclear warheads. These now maintain her security and her life. No major Middle Eastern nation would endanger Israel’s existence and risk nuclear destruction of her major cities, with the possible exception of fanatic Islamofacist Iran.
Assume now that this analysis is faulty. Nonproliferation is still crazy. Democracies do not make war on each other. So, if they have nukes, they do not endanger other democracies. Thus, eliminating nukes only removes their protection from nondemocracies.
The only informed and logical policy then, is to assure nonproliferation among the thug regimes of the world.