Gee, what could possibly be the root of a religious fanatic murdering people he considered subhuman, I have no idea. Regressives happy to still blame christianity and christians, somehow, but blaming islam is beyond the pale. This happened because of right-wing anti LGBT propaganda, and christian hatred of gays, and lack of proper firearm regulation, and etc. Islamic hatred of gays and other decadent features of western civilization is completely irrelevent, and discussing it is dangerous because it puts innocent muslims under the spotlight of hateful racists. bundle of stickss like Heskey take their safety very seriously, so much so it is the primary conscern when such things happen. If it wasn't for these flagellating tolerant saints the neochocolate chip cookie reactionaries would've genocided the peaceful tolerant muslims long ago, apparently.
The equivalent for me would be people talking about gun control and mental health care and other completely unrelated things when Breivik commited his terrorist attack, anything at all but his worldview and his own reasoning behind his attack. Of course the regressives were more than happy to talk about the real issue in that case, it is something that could safely be used to cast generalized contempt of their own culture.