So here's how it appears to me and I suspect many other news readers, never mind the real motivations. At the Associated Press, when you're covering situations like suicide bomber attacks on Christian churches in Nigeria yesterday, you hold out as long as you can in speculating about who is responsible, even though Islamist Boko Haram terrorists (and only Boko Haram terrorists) have claimed credit for previous attacks in that country, and even though no other religion on earth generates large numbers of people who claim to be its adherents who are willing to blow themselves up so they can kill as many infidels as possible.
Then, once the inevitable claim of responsibility arrives, you treat it as old news (the bombings were a whole 24-36 hours ago, y'know), focus your headline and coverage on "Christian" reprisals instead (even though there is no element of Christian doctrine which sanctions random reprisals), and identify who carried out the attacks as late as you possibly, so it will end up not making most broadcast and many print reports. Here are excerpts:
It would appear that the establishment press is determined to portray a "both sides are at fault" equivalency as much as possible in Nigeria where almost none exists.
Earlier today, Patrick Poole at the PJ Tatler pointed out that a brief initial Associated Press item from Lagos would cause a person, in Poole's words, to "come away mystified as to why these churches were subject to apparently random 'violence.'" He specifically objected to the vagueness of a sentence claiming that "Churches have been increasingly targeted by violence in Nigeria." Later more detailed dispatches from Reuters and the AP aren't much more helpful, especially as they both fail to tag the principal perpetrators of the violence, the Boko Haram, as the terrorists that they are.