Season 3 theory (spoilers)
This post contains spoilers, so don't read if you haven't seen season 3.
I have seen the first five episodes. I think what the victims (excluding the priest, killed by a copycat killer) have in common is mistreatment of children -- at least as perceived by the killer.
- Victim 1 Helle Anker was about to open a kindergarten where children were not to be defined by gender
- Victim 2 Hans - the guy who kidnapped him for ransom (and was later shot, presumably by *the* killer) said that because of Hans's involvement in his case, he would no longer be able to see his children once he got out of prison (something along these lines)
- Victim 3 - a paedophile - self-explanatory
This leaves a list of potential next targets:
- The woman who had an affair with the 17-year-old guy who committed suicide
- The pregnant girl who sold the baby to the wealthy man, and everyone connected to that storyline really
- Saga - this season has introduced the idea that she might be responsible for her sister's suicide - however that's what her mom says and there is something off about her character
- Henrik - it looks like his missing wife ran away with the children - was he the reason?