If Al-Qaeda really wanted to attack Western cultural imperialism, threaten UK/USA economic stability, and strike where it would hurt the most, pause for a moment.
Take a look at where the things you buy tend to be made these days.
Now ask yourselves why the Islamic fundamentalist crackpots aren't targeting factories in China.
http://news.bbc.co.uk/1/hi/england/devon/7415831.stm