Personally, I would not burn their Koran because I believe not all Muslims are bad, so why punish/insult the masses for the actions of a few lowlife scumbags.
But with that being said, I think it would be hilarious for the radical church group to stage a live video feed aka Terrorist feed style, with an American Flag in the background, Hulk Hogan's Real American Hero song playing in the background, dark cave like setting, their faces covered with a similar muslim scarf the scumbag terrorists like to use, burn the Koran, and have the whole thing broadcast on that terrorist channel Aljazeera.
Just to enrage the terrorists, it would almost be worth it
Hulk Hogan Song
https://youtube.com/watch?v=-f4xyA45HKo