A few reasons.
First, did you read the article? The article quotes a fucking Facebook post as evidence of what occurred. It actually says, "According to a post on Facebook that the newspaper saw."
It actually never says the attacker was Muslim. I do not know if the TS invented that aspect, or if he has some other source, but the article never says that.
Basically, it's a shit article.
Second, If posters here made threads every single day about every single racial attack from a white person anywhere in the world, you'd show up calling him a race-bating scumbag piece of shit, etc. Right?
You would not do that because you're racist. You're not racist. You also would not do that because you support the terrible crimes committed. You obviously do not. You'd do that because it's obvious the person is intentionally flooding the forum with negative stories about that particular group and rehashing the same insults.
This particular article quotes Facebook posts, has little confirmation from authorities, and happened in Denmark. That is scraping the bottom of the barrel in terms of newsworthiness. No?