@Foofie,
Aside from your obvious provincial knowledge regarding other countries, what I don't understand is what does others not caring about the US have to do with any given US citizen having feelings for the plight of other people outside of their own country?
We have empathy. When otherwise left to develop without the input of (too much) trauma or neglect, it is our 'natural' state. And once we have it, other than an active choice to ignore our world around us, we have no choice in feeling it (it would take a concerted effort on our part to reduce it).
And what does it cost us? In fact, in the long run, it is probably beneficial to our health.
Bottom line, I see no reason why someone I don't know didn't respond to my plight has any
necessary influence on whether or not I feel for someone else's troubles. When I do this, I am making a statement that I control who I am and how I react, not others. And this precisely because I see no ill effects from my empathic feelings.
When I was young and told someone I liked their picture and later they were a jerk to me, I still liked their picture..
Separate things..