@oristarA,
It's difficult to do considering that we don't know the intended audience, ie. the register which would influence word choice, Oristar.
As a way of getting your message across, it is understandable, but portions don't sound natural. I'm going to assume that this is someone talking. My changes reflect only stylistic changes. Others might have other ideas, many of those ideas might well be better.
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What is most urgent is to feed your people, [and] to
not let them starve. [The] So-called American Imperialism is a great misconception. War hurts, even if you can win the war with nukes.
[In case] Should North Korea
's military force
s bomb South Korea into
the Stone Age, [NK will also get the Age as a return] North Korea would be treated in kind.
So what is good for your country?
The US government is not perfect, but it does not make its people hungry. Yet most of
the North Korean people are now suffering from
a shortage of food.[the food shortage].