BBC NEWS | Europe | Cartoons row hits Danish exports: "A Muslim boycott of Danish goods led to a 15.5% drop in total exports between February and June. Trade to the Middle East fell by half, statistics show."

The Cartoon war costs in trade are more clear in the trade figures:
"National statistics show that exports to Denmark's main market in the Muslim world, Saudi Arabia, fell by 40% following the boycott, while those to Iran - its third largest market - fell by 47%.

Exports to Libya, Syria, Sudan and Yemen also suffered big falls.

The cost to Danish businesses was around 134 million euros ($170m), when compared with the same period last year, the statistics showed."

I think trade boycotts are the appropriate, peaceful way of groups protesting actions of others -- but when it becomes gov't sponsored and enforced, it goes too far.