Denmark is a small country which makes it very easy to be found.
What's probably happened here is that the bikes were stolen without really realising what they were and how hard they would be to sell as they are such one-offs. That they weren't stripped for parts is the giveaway. Most high-end stuff is exported or stripped for parts as frame numbers are traceable here.
Villains cut their losses and "ransomed" them back to the owner - just like a regular kidnapping.
Most non-violent crime here is mob related - either indirectly via drugs with people stealing to feed an addiction/debt - or in various mafia-type syndicates (often foreign). What isn't is usually people "passing through" on crime vacation from eastern europe. I an sympathise that this guy feels threatened by the former type.
Disgusted that the police haven't been more helpful though. They used to expect VIP treatment when they come with their own high end bikes when I worked for Heino Cykler.