The flag of the Kingdom of Denmark, a Lutheran kingdom, is a red field with a white Cross and is known as the Dannebrog. It shares with the flags of the Swiss Confederation and of England this general order of colors and with the other Scandinavian flags the Latin Cross of those once proudly Catholic lands.
Unsurprisingly, the Dannebrog dates from long before the Reformation and it should truly be considered a Catholic symbol -- the red being, naturally, the color of martyrdom and of the Precious Blood of the Redeemer. The general design of the Dannebrog has been used for centuries as a symbol of the Resurrection, of the sacrifice of the Lamb of God, and was a common banner throughout medieval Christendom.
Angry mobs around the world have been burning the flag of the Cross because of some cartoons published in a privately-owned Danish newspaper, which have supposedly offended them (the Brussels Journal has been covering this ridiculous "crisis", which has become a real crisis, for many months). So they burn the flag of the Cross as some kind of putative vicarious revenge (see the connection?...).
I am beginning to agree with those who say that Islamic unrest is related to economical difficulties: I cannot fathom how people with real jobs who have to raise families would have the time and energy to protest so much because of some cartoons published in a foreign newspaper...
Lord, give us the peace that only you can give. Da propitius pacem in diebus nostris.