Boycotts are fair instruments of expression, but the threats of violence are barbaric.
I guess I can't completely disagree with you, but I will say that it still seems unjustified - why should all Danish companies suffer because of what a newspaper says? It'd be like me getting offended by USA Today or the Chicago Tribune and boycotting Burger King as a result.
Just IMO, of course, but even the boycotts strike me as irrational.