It also says this:

"Comments should get more thoughtful and substantive, not less, as a topic gets more divisive. "

And the comment really had nothing to do with the article. Just a opinion shouted in to the room without backing up besides mentioning "random yt videos" as the source.

True, but... when they themselves say that they didn't read the article, and post a random opinion that is contrary to the article, then "maybe you should actually read it" is at least somewhat called for.

OP edited their comment. I think the original said something to the effect of "I didn't read it but I bet it says..."

At least, that was my understanding of the comment that I replied to. Normally I wouldn't say "Did you even read the article" when responding to a thought or opinion