His avatar and the site does have some truth to it. If Muslims preach their religion is peaceful, why do quite a few (compared to other religions) interpret the Quran as a message of "kill the infidels"? Is it the religion itself, or is could it be the nature of the people? Either way, you can't say Islam is more peaceful than modern day Christianity or Judaism.
Of course we can't. But arguably, any of the religions can be interpreted numerous ways; peacefully or not. The Westboro Baptist Church firmly believes "God hates fags" and kills military servicemen and women out of anger for our tolerance. A great example of a violent interpretation of the Christian religion.
ReligionofPeace.com just generalizes Muslims and thinks they all interpret Islam violently. They're also gay-hating religious nutjobs.
WBC sure they are 'extreme', but do you see them blowing themselves up? Their interpretation is extreme, but its extreme to the point that 'God will come down and kill all the sinners.' For Muslims its, I have to take God's will upon myself to kill the sinners/infidels. Huge difference there.
Westboro's are douchebags, I'll give them that, but they are extremely peaceful in their actions. Sure they convey messages of hate....but have they killed anyone over it?
Generalizations are not up to the outgroup to discard, its the ingroup that's responsible for tossing aside the generalizations that get made against their group. Yes, the media doesn't cover a lot of the good the Islamic faith has done. Still, if the Islamic people want to get rid of that "terrorist" stigma, they need to actively (strongly etc) campaign against it, not shrug it off and say 'its bad, our faith would never do that!'
Also, between Christianity and Islam, Christianity is more open to change (more liberal) than the Islamic faith. Both are still way behind, but in terms of actually changing for the current society, Christianity is miles ahead.