FBI - Federal Bureau of Instigation?

So, the FBI knew at least one of the bombers and, according to his mother, was counseling him every step of the way?

http://www.chris-floyd.com/component/content/article/1-latest-news/2315-context-and-contact-exploring-agents-of-influence-in-the-boston-attacks.html

I'm sure most people won't care about this embarrassing detail, but as I have said before the US always seems to have its fingerprints all over these so-called "terrorist" acts. Why is that?