Planning the violence in advance:

This past January, a senior Hamas operative in Britain named Muhammad Sawalha, who was involved in launching the previous flotilla, said the next convoy will avoid the type of confrontation that occurred the previous time with Egypt, and that next time, “the confrontation will be directly with the Zionist enemy itself on the high seas.”
http://www.virtualjerusalem.com/news.php?Itemid=2691