I probably would have laughed if it was a good racist joke, I'm pretty laid back towards racism and the like - I think the world has got massively PC.
However I don't think the shock factor of that post was anything to do with race, race is a consequence but what you're really joking about is children dying every 3 seconds, and boasting the fact that we as a nation could deny them their life, and suggesting we do so. Again, if it was a well constructed joke... kudos, but that just seems like a dig at third world countries, not a joke, it's fucked.
Racist or not, the joke was bad... and if you're going to tell a racist joke don't do it in a public place, tell the people you know will see the humour. I could probably tell a good racist joke to Atom and we'd have a laugh, but I wouldn't come here posting it.
Racism and international bigotry is not for public consumption. Basic life fact for you there.