Fear of a Black President
And DFH in Dubrovnik answered in comments: All their tax money is being spent by a black guy.
I'm afraid that's all there is to it. And if you can't admit that, it makes no sense at all.
You could explain that most of them got tax relief; they will deny it.
You can explain that this is Bush's debt, and Obama's trying to fix it; they don't want that.
You can explain that Clinton did the exact same thing in 1993 and left office with a surplus; they don't remember that, and they don't believe it.
As we used to say when I was in the Navy - "Fuck 'em if they cant take a joke."