Quoting the article:

"Interestingly, the mosque chose one of its more controversial backers, Walid Fitaihi, to recite from the Koran. Fitaihi has been a lightning rod for criticism because he wrote an essay in an Arabic-language newspaper calling Jews 'murderers of prophets.' He has since apologized and the mosque said it had reprimanded him."

Sounds like it wasn't a public apology/retraction, and that he said a few other inflammatory things originally too:

http://misskelly.typepad.com/miss_kelly_/2007/04/walid_fitaihi_a.html

(Of course, this would be a non-issue, if all sides could just agree to stop killing each other over who is G-d's favorite child and who gets to inherit the family house. Subdivide it already, and save the lingering resentment for the condo association meetings.)

Paulson reports on those.