Why do you think this is not relevant? Everything that came out of 4chan is not a surprise, it was accepted there from the very beginning. It just took proportions that nobody would expect.
There was an article in Motherboard[1] how /pol/ is being idealogically driven due to moderation choices. I don't believe moot would have allowed such an ideologically driven moderation changes to continue for so long. (IIRC, moot had deleted /pol/ twice, once as /n/ which he removed for being too much like stormfront).
[1] https://www.vice.com/en/article/m7aap8/the-man-who-helped-tu...