http://www.thedailybeast.com/articles/2015/09/11/terrorist-t...
This guy got articles published as radical feminist as well beyond being a fake isis terrorist, fake white nationalist, fake jewish lawyer.
But I wouldn't say that chan culture is about this, or that there is an inextricable link between them. It's simply a common occurance by nature of being anonymous. More often than not, "bait" is called out as such, but even if you're being serious, you can ignore that.
A mixed bag, but certainly not representative. I know of many on the politics board who do sincerely hold nationalist or white supremacist views, and I have argued against them. I also know many on the left-politics board who will talk you through Marx's critique of capitalism.
There is some nuance in my opinion.