http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/07/05/nterror405.xml

"It also referred to using six Chevrolet GT vehicles and three fishing boats and blowing up petrol tanks with rocket propelled grenades."

They are trying to make the world a muslim world. They think by trying to ignite or rather commits acts or war/terrorism everywhere then people will become sheeple to thier cause.