1) Wikipedia is not the sole custodian of "free speech", and indeed a bunch of computer geeks posting (allegedly) inflammatory pictures on the internet is going to do very little to establish a Utopian e-Paradise replete with such lofty ideals as "free speech, liberty and equality", the benefits of which would be apparent to anyone (Muslim or otherwise) who has passed middle school history.
2) I very serious doubt whether even the most fanatical Muslim would go through the trouble and expense of organising and executing a real-life attack on said bunch of computer geeks. Indeed the most realistic fallout of your newfound love for speech would be a beating to Wikipedia's credibility.
3) In conclusion I would very sincerely suggest that you delete the said image and encourage the press to run a story on page 19 about autofellatio.jpg, Tentacle_rape and God_Hates_Fags to enlighten the world to how sincerely you value WP:NOCENSOR, WP:NPOV and WP:ETC ETC.