>danish F16's had to act on it //

Because?

Some jets flew over that caused no harm to anyone, wasn't probably even seen by any civilians. Is that a reason to retaliate with a show of force - or had they already used diplomatic channels to tell them that this was not allowed?

This sounds like you want to start WW III because someone stepped on your toes at the bar. Sweden perhaps don't think that some other country swinging their dick is a reason to get in to armed aggression.