No. The people planning this knew it would result in their death and the deaths of those around them. I don't just mean the ones who actually did this. My dictionary defines a coward as a person who lacks courage in facing danger, difficulty, pain, etc... These people were not cowards and their attack was not cowardly. It was evil. I don't give these people credit for courage because their irrational and evil beliefs allowed them to have the state of mind to face danger. Only men with a rational appreciation of danger and consequences should be given credit for courage. So these people were neither courageous nor cowardly. Just garbage.