We know they're SJWs because they're attacking him specifically because he doesn't buy the anti-GamerGate narrative. We know they're SJWs because they're saying objective information about a product is harassment. We know they're SJWs because they're crucifying him for being pro-consumer. There is a preponderance of evidence which supports the theory that those harassing him are SJWs, even if he refuses to call them that. It's based on their behavior.