Everything is connected. If they hadn't caused such an earthquake on the currency market, the CHF wouldn't have jumped so much compared to the EUR, which means that SNB's euro holdings would have lost less and the Swiss exporters would have been hurt less.

I still have no idea why they did it that way. These things never happen by accident. They knew very well what was going to happen, yet they chose to do it nevertheless. There was a reason behind it, a reason why it looked like a good idea to them. I just can't figure out what it was.