I’m a Danish citizen. The story doesn’t really surprise me (given the news a few years back that US spy on EU MPs in Brussels by eavesdropping Belgian telcos). The worst part is the complete apathy from Danish politicians to stand up against this kind of spying and take action. It’s completely unacceptable and should be prosecuted; yet none of the centrist parties are interested in or motivated by standing up against…
The outcome of spying is that we know what our allies are going to do. If our intelligence verifies something our allies told us already, this process fosters trust and better relations. If our intelligence uncovers lies, we have forewarning and are not caught completely off guard.
I like both outcomes, though I can see how being spied on would feel bad. I suspect governments have come to much the same conclusion, because it seems tolerated that pretty much every embassy on earth is 50% spies. Yes, even european embassies in the US. In fact, opening new embassies in allied countries and increasing the number of staff in them is seen as a mark of friendship.