Did they really cheat the EU tests or did they optimise the car for certain conditions? It's a bit like tax, optimising my tax is OK, evading is not.
To take two examples:
If it's true that the car goes into low emissions mode when driven straight ahead at 40mph then that happens to fit half my commute to work on a good day.
If the car used a GPS locator to know that it was in a test centre.... that's another story.