That would be akin to me arguing, after the tragic Minnesota bridge collapse in 2007 killing more than 100 people, that free democracy was the direct cause of massive decaying infrastructure across our country that was killing dozens of people on a regular basis.
However, he was not much of a competent terrorist: In 2002 he researched the feasibility of bringing down the Brooklyn Bridge by using a blowtorch, an enterprise akin to demolishing the Empire State Building with a firecracker.