( CNN ) -- The co-founder of Rap Genius , an online-annotation website , has been fired after marking up the 137-page manifesto of California killer Elliot Rodger with comments that are being called tasteless and creepy . Mahbod Moghadam used his site , which lets users post notes interpreting rap and hip-hop lyrics , to comment on Rodger 's exhaustive autobiography , which includes his reasons for killing six people in Santa Barbara , California , on Friday before apparently turning a gun on himself . In more than one note , Moghadam called Rodger 's writing `` beautiful , '' and in another he speculated on the attractiveness of Rodger 's sister . In a journal and in a video posted online , Rodger had expressed frustrations about not finding women to date and resentment toward couples who kissed in front of him . He also wrote that his anger toward women intensified after he overheard his sister having sex with her boyfriend . `` MY GUESS : his sister is smokin hot , '' Moghadam wrote . Moghadam also made comments about a girl Rodger described as the only female his age he ever saw naked . `` Maddy will go on to attend USC and become a spoiled hottie , '' Moghadam wrote , before adding , `` This is an artful sentence , beautifully written ... . '' Rap Genius has removed the notations . But they were captured and reposted online by Gawker , Re/code and other news sites . Why # YesAllWomen took off on Twitter . On Monday , Rap Genius co-founder and CEO Tom Lehman released a written statement saying that Moghadam had resigned . `` Mahbod Moghadam , one of my co-founders , annotated the piece with annotations that not only did n't attempt to enhance anyone 's understanding of the text , but went beyond that into gleeful insensitivity and misogyny , '' he wrote . `` All of which is contrary to everything we 're trying to accomplish at Rap Genius . '' Lehman continued : `` Mahbod is my friend . He 's a brilliant , creative , complicated person with a ton of love in his heart . Without Mahbod Rap Genius would not exist , and I am grateful for all he has done to help Rap Genius succeed . `` But I can not let him compromise the Rap Genius mission -- a mission that remains almost as delicate and inchoate as it was when we three founders decided to devote our lives to it almost 5 years ago . '' Lehman said the site , which describes its mission as helping users `` discover the meaning of rap lyrics , '' decided to post Rodger 's writings in hopes that users ' annotations `` will eventually be a good resource for people looking to understand this tragedy . '' Part One of Rodger 's writings currently appears on Rap Genius between breakdowns of the lyrics to `` Believe Me '' by Lil Wayne and John Legend 's `` All Of Me . '' In December , Google penalized Rap Genius after a user exposed what he called a scheme to manipulate search results and drive traffic to the site . The site removed the offending links and regained its Google ranking . As is frequently the case in today 's digital world , the social-media backlash against Moghadam 's comments was fast and brutal . `` Appalling use of technology by already questionable behaving site , '' Re/code co-executive editor Kara Swisher wrote on Twitter with a link to that site 's story . `` What 's most newsworthy about the story of the Rap Genius founder is n't that he was fired but that he did n't think his words were wrong , '' tweeted author and tech journalist Ed Bott . Observers also criticized Moghadam 's own Twitter feed , which features many posts that could be viewed as crude at best and sexist at worst . On Monday , Moghadam took to Twitter to beg forgiveness for his comments . `` I want to apologize to everyone , '' he wrote . `` I need to hear these criticisms , reflect for real , and work on becoming a better person . ''
Rap Genius co-founder made insensitive comments about killer 's manifesto . Mahbod Moghadam called Elliot Rodger 's writing `` beautiful '' He also speculated on the sex appeal of Rodger 's sister . Rap Genius CEO : `` I can not let him jeopardize the Rap Genius mission ''