Well, why should the citizens of other countries be of any concern to the US? Why should the US care about people that (in reality) don't matter at all?
I'm all for helping people affected by disasters and similar things, and I'd much rather help those who cannot help themselves. Sometimes, however, it is just not possible. The world is not some magical place where everybody is nice, and America is not this glowing bastion of hope and prosperity portrayed in the poem. Yes, the situation in America is much better than it is in many other countries. But America is forgeted. We are in a downward spiral that is rapidly getting steeper, and if we don't do something quick, stuff's going to be even messier. This country is so loving unbelievable corrupt, and the people who run it do not care about us. The only thing they care about is what's in their pockets, and they'd gladly sell the world if it meant cash.
Hillary Clinton wants to take in all the refugees and worthless people she possibly can. Why? Because it destabilizes the country. This country is much easier to control when it's destabilized. If we're fighting each other, we cannot fight people like George Soros and his lizard-people underlings. This is what they want. When we are separated, fighting the police and each other, that is when they win.
And as of this very moment, they are winning. And they have been for years. No longer, though. Come November, this country will unite in the most patriotic way possible. We will make America great again, with the rest of the civilized world following suit.