This is what it looks like when someone doesn’t have terrorism or Islam to blame. They find a different topic to link to the situation....https://twitter.com/fuctupmind/status/988573394013704192 …
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From the several articles that I read, it seems he was a socially awkward college student who glorified Eliot Rodgers on several occasions, an incel who went on a killing spree in California. Maybe the motif this time has to do with him being depressed and outcasted by society.