Whose fault is it?

Read somewhere:
"In the meantime, looks like Europe is in big trouble and it will affect us as well. If they throw us into another recession--that is if the financial sector gets hurt again"

Funny, in Europe they say exactly the opposite that the economic crisis was the America´s fault.
But there are also the ones who say that in reality it is a Chinese´s fault.
I guess it is just the mathematic´s fault.
If you spend much more than what you earn, sooner or later the minus creates problems, especially if you borrow the money...