"the islands will be uninhabitable for centuries"
As bad as it would be, I think the hyperpoble, and the gratuitous Trump-hate, undercuts your argument.
Hiroshima was bombed in 1945.  It was re-inhabited soon after and there is a thriving city there.  There are trees close to the blast site that survived and are alive to day.
A major danger right now is the Russian Hysteria, where there are those who seem to prefer war to trying to live with Trump's presidency.
We have a partial peace in Syria, Mosul/Nineveh is retaken, and Raqqa will be next.