Yes, this is actually happening.
The next time someone tells you that Islamization is a myth, a conspiracy, a scare tactic, remember this post. Back in 2005, I posted a piece on a similar situation in Helsinki. They even had special jackets made up for them, and the Finnish police gave it a wink and a nod.
They’d better be careful when they challenge someone carrying a bottle. It could be one of their co-religionists carrying acid.