I can't believe they didn't make any mention of Putin and Russia's military might not nuking Atlantis and Paradise Island straight off and avoiding this whole mess.
There's Obama sitting on his hands and waiting till everyone died.
Russian and China won't care till it hits their borders
shareobama tried to send in the military but they were mentioned to have been all slaughtered. the world's militaries had long since realised futility of sending in non superhumans.
nukes would kill everyone, and atlantis and amazons both had magic that managed to shield themselves from most non magical assault.
the amazons magic even stopped a continent destroying wave so you think nuclear missiles will matter?
furthermore a nuclear attack would end all life on earth. theyd "win" but lose the world in the process.
if anyone saw the USA launch nuclear missiles, you think no one will notice or care? especially since the amazons have taken up residence in britain which is too close to russia for them not to think the strike is against them.
you'd have world war three in the next ten seconds.
in the movies its always an agonising last resort to use nuclear force. you would essentially be saying "oh if we cant have the world, you can't either"