Why wouldn't they? It's free real estate, as it were.
As for the ADL: feed a bear and they will happily take it. Ten minutes of research and they would have seen it's a troll.
This perfectly summarizes a frail old media trying to survive against a vibrant uncontrolled new media.
You seem to have this idea of "old" media being a bunch of out of touch old people typing on typewriters and using rotary phones, and "new" media being hip punk kids sticking it to the man with their dank memes and irony, but this is a myth. They're the same thing now. Old media transitioned into the new media landscape years ago, the web and sites like 4chan haven't been something only young people understand for a long time (if that was ever the case) and new media is controlled by many of the same old media interests.
I think the article paints a picture of the rise of hate groups and the appropriation of a commomly used and innocuous hand gesture. Hell, as a diver, I now have to think about the fact that some Bad Actors have taken what I use to indicate that I'm fine and turned it into "I support genocide."
So how about this still means "OK" if you're a normal person and you're not proudly flashing it at the end of a stiff arm in a crowd of skinheads?
Doesn't context count at all?
Edit: I'm not shouting at you, just generally in despair. Tone is more like, rolling my eyes with you. And I'm not sure why you're being downvoted.