What's all the same interesting in this [European] election, if we look at the Netherlands, Germany, France, is that all those who have been saying the same thing after the crisis as they were saying before the crisis, have failed.

and

The Greens have a hope of doing something, and it's not by chance: their ideological hard disk was already opposed to productivist capitalism and to social democracy, in its radical communist version or its soft version. From the start, it was possible for them to take up a modern discourse.

He's saying two slightly contradictory things here: ie the Greens did not change, but their discourse was suddenly more acceptable in the new circumstances, so they did not get punished.

What I think he means is that the socialists were not critical enough of the old system before, and haven't changed much their tune; while the right, which carried the system before, at least tried to be pragmatic recently, by moving towards more interventionism.

So, what worked politically was either being fully neoliberal, and moving back to statism somewhat (or beign seen to move that way), or being fully critical of that system, but not the softer criticism of the socialists, which was overwhelmed before by the rightwards push, and is overwhelmed today by the similar push of the right towards pseudo socialism.

Or, in other words: if you're too close to the right, you lose.

In the long run, we're all dead. John Maynard Keynes