Details are still emerging about the attack in Christchurch, New Zealand, in which at least 49 people were killed at two mosques. However, it appears that one person with advance knowledge of the planned attack is an active participant in a radicalized online right-wing media culture. Before the massacre, a man posted a long manifesto, police said, which was full of inside references to online memes and ideas that are commonly circulated among the radical right. Read more about The Christchurch shooting suspect comes from an extreme online culture
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