He didn't lose his job because of 4chan, but because of ostensibly well-intentioned midwits who believe "4chan succeeded in transforming a symbol" and "fake things can be real". Truly, this type of rationalization is the Bell Curve meme in action.
He was fired because of the reaction -- engineered by 4chan -- of over-intellectualizing social justice nabobs who attend rallies and protests. You guys were literally told the punchline of the joke and still walked right into it.