The real cause of the Eurozone crisis?

I saw this article on Twitter a few days ago.

The article itself is in Spanish, but that's of no real concern; what counts is the graph:

It shows when interest rates on government bonds of various Euro-zone countries changed.

As can be seen, everything was fine until Lehman Brothers collapsed in 2008, so kicking-off the world's current economic problems.

Is this the actual cause of Greece's current problems? Tweet