I'll resist the urge to combat some of your specific points and focus on the forest.

I think there's simply a difference between funds going towards foreign policy, and ones that basically deny you autonomy. America is highly individualistic, but that's also just human nature. Many will care more about their groceries increasing by $10 a month than a billion dollars going towards a war somewhere else.

Also helps that America hasn't experienced a war on its soil in almost 80 years now. Or technically 200 years since I don't think Hawaii was ratified yet. The idea barely registers as possible to happen.