Not.
Listen, the idea that aliens are going to save us from nuclear war is one of the stupidest things I've ever heard. The thinking goes that nuclear explosions rip holes in the fabric of space-time (which may well be true, for all I know) and that nuclear weapons are so destructive to the well-being of creation (which is also true, in my opinion) that benevolent aliens would never permit terrestrial humanity to conduct a nuclear war. And that's all airy-fairy bullshit.
I'm here to tell you that if you want to be saved from nuclear war, then you will have to save yourself, because the nuclear war is already well underway and it hasn't been stopped by aliens yet.
Point One: Hiroshima and Nagasaki. Remember them? The Japanese cities that the USA incinerated with nuclear fire at the close of World War II? Aliens didn't stop that from happening.
Point Two: In more than half a century of nuclear weapons testing (and limited nuclear warfare against Japan), beginning in 1945, something like 2,053 (or 2,055 counting the recent North Korean nuclear tests) nuclear explosions have occurred on this planet. Aliens haven't stopped any of these thousands of nuclear explosions. Japanese artist, Isao Hashimoto, has made a very instructive and sobering You Tube video that graphically illustrates this ongoing war. All of these explosions released radioactivity. The bombs dropped on Hiroshima and Nagasaki killed very large numbers of people. Aliens did not stop any of it.
So if nuclear explosions rip holes in the fabric of space-time (and I would not be surprised if they can and do), then the fabric of space-time has been well shredded in the past several decades. And aliens haven't prevented it.
Point Three: Aliens did not prevent the nuclear power plants at Chernobyl and Fukushima from exploding and melting down. Neither of these crises have been effectively contained or controlled and probably cannot be.
Point Four: There are several hundred nuclear reactors in the world, all but four of them in the northern hemisphere. Aliens have not prevented them from being built and operated. All of them are susceptible to catastrophic failure, as has happened at Chernobyl and Fukushima.
Point Five: The USA and its military allies have fired myriad tons of depleted uranium munitions on battlefields in the Balkans, Afghanistan, Iraq and Libya. Depleted uranium weapons have hideous effects, saturating the environment with deadly radioactivity for hundreds of thousands of years. Click here for the macabre photos of monstrous birth defects caused by depleted uranium. This is what depleted uranium does to human DNA. Aliens have not stopped any of this.
Point Six: The great masses of humanity, with rare exceptions here and there, have so far not bothered themselves to meaningfully protest, oppose or resist this nuclear onslaught in any way, shape, fashion or form.
Point Seven: It's probably already too late to prevent nuclear apocalypse. It's already underway -- see Chernobyl and Fuskushima above. The vast majority of humanity did nothing when there was still time to do something, and now the suffering has begun.
Point Eight: This is terrestrial humanity's planet. It is ours to save or lose. Our choice. So far we have chosen to lose it.
Point Nine: To date, aliens have not prevented any of this.
Point Ten: If you would like to support my writing, please click here to buy my books. The aliens won't prevent you from doing that either.