These various different killers that you refer to each had their own individual twisted reasons for doing what they did. These islamist killers all have a similar cultural background and their reason for killing is virtually the same. The act of murder was based in their religion.
Also these other killers that you mention are a micro-percentage of the culture that they live in. The Muslim population may be mostly peaceful but they have a healthy percentage of radicalized individuals and much of their mainstream population is at least partially sympathetic to the goals of those radicals.
It is willful ignorance to deny that there is a worldwide problem with the Muslim religion and it's interactions with other cultures.

Labels: moderation: identity_attack