Thats the term Stallman came up with when the first distributions (esspecially Debian) started to build up. It wasnt really popular even back than so he setteled in GNU/Linux as alternative which to this day is in the name of quit a lot distributions.
It was never the plan/intend to rename the Linux kernel itsself to either of those terms.
Really hope they find the caller and bring him to court. I mean both streamer and police are the victims here.
At least it hasn’t been a actual SEK unit (SWAT in Germany) they look more like normal patrol officers. But nevertheless it’s unacceptable.