Becoming radicalized and brainwashed isn't gonna be prevented by speeches from 'top levels of islamic sects', although the muslim communities apart from the extremist elements such as the Wahabi muslims assoicated with Al Qaeda always condemn any terrorist acts. In fact, Saudi Arabia is doing a good job infiltrating the al-qaeda subgroups and foiling many plots in their own country even though it's the hub of hte extremist ideolgies behind al-qaeda adn the like.
http://www.economist.com/world/mideast-africa/displaystory.cfm?story_id=12470503
Likewise, the muslim communties here in Canada denounce any terrorist activities especially those carried out by the so-call islamists. In fact there was a Muslim informant here in Canada who foiled a serious terrorist attack on the parliament
http://www.cbc.ca/news/background/toronto-bomb-plot/shaikh-interview.html
The sheer scale and sophistication of hte attacks suggests that al-qaeda was behind this in some way or form. Pakistan is where the anti-terrorism efforts should be directed at as it's the safe-haven for the al-qaeda leaders and much of the radicalization takes place. Bush and cheney should've gone after teh taliban and al-qaeda in Afghanistan and Pakistan to fight terrorims, not invent bullshit to go after Iraq's oil. Hopefully Obama follows up his talk with action and actully does something about Afghanistan & Pakistan.