NBC has posted a few pages of Cho’s (redacted) manifesto online : he does indeed mention 9/11 on page 2, although he casts himself as a victim, not as a jihadi perpetrator.
http://www.msnbc.msn.com/id/18186053/
I doubt many Jihadists are using terminology like “F___ing Osama” (MSNBC, in an act of supreme silliness, blacked out the profanities in the manifesto portions they posted, but I think it’s a safe assumption it was an F-bomb.)