The radicalization preceded the Iraq war.
"To understand why more and more Muslims are becoming radicalized, one can look to the original currents that fed into the violent Islamic extremism of the 1980s and '90s, culminating on September 11, 2001. Along with a majority of the 9/11 hijackers, Osama bin Laden is a Saudi who embraces the fundamentalist Wahhabi version of Islam, puritanical in its strictures and extremely intolerant of nonbelievers."
FRONTLINE/WORLD . Canada - The Cell Door . Reversing Islamic Radicalization . PBS
I guess that puts a stake through the heart of your argument.
Really? Did you even read the article you posted? From it:
Evidence of a growing radicalization in the Islamic world is substantive and quantifiable. Data points include the recent deadly riots by Muslims infuriated over cartoon depictions of the Prophet Mohammad published in a Danish newspaper, and extended rioting and vandalism in France by disaffected Muslim youth. In Europe, intelligence officials report a significant rise in radicalized Muslims joining terrorist networks by the hundreds, and perhaps thousands, in order to wage jihad against the U.S.-led coalition in Iraq. In the most recent Pew global attitudes polls, approximately 15 percent of Muslims surveyed in Britain, France, and Spain believed suicide bombings and other forms of violence were at least sometimes justified in the defense of Islam.
By the way, thats only one authors view. Any particular reason you treat it as sancrosanct and as a complete answer to the question?
Since you require a more complete answer, here is your history lesson for today.
King Abdel-Aziz was the founder of the kingdom of Saudi Arabia. He found himself battling the Ikhwan, a tribal religious militia of extremist Wahhabibs. This was in the 1920's. An alliance between Abdel-Aziz and the family of Mohammad bin Abdel-Wahhab resulted in the conquest of what is now the kingdom, and the kingdom assumed he religious preference of Abdel-Wahhab as far back as the start of the 20th century.
The Saudi's have used religion both to retain control of the kingdom and as a projection of foreign policy. The radical Wahhabi elements have resurfaced in the kingdom many times, but the royal family has been able to use tribalism, familism, religion with Quranic imprecations of obedience against Islamic rebels.
I recommend a facinating book, "The Siege of Mecca,' by Trofimov, if you wish to understand the wars between Riyadh's Islam and radical Islam, which covers the conquest of Mecca by radical Wahhabis in 1979, and the subsequent re-taking by the Saudis with the help of the French. The brother of ringleader Juhayman was later involved in the assassination of Sadat.
Summary: radicalization goes back before 1900, and has been an element that few countries besides Saudi Arabia have been able to control and even direct.
Thats nice. Too bad it doesn't detract from my point. Many muslims were radicalized by the invasion of Iraq. This doesn't, obviously, mean thats the only thing that has ever radicalized anyone, and its likely thats not the only factor. But it was a major contributing cause for a large number of people, and the article YOU cited, states that.