I don’t know specifically, but both options seem likely. The main criteria is a broken household, and hatred for European values. Funny enough, while most of them are muslim, religion play very little role in any of this (ie it is not religiously motivated but rather facilitated). It is rather a factor in the selection criteria. Migrant heritage plays a far bigger role.
Some personal insights from the field. Most gangs in Sweden fight about turf control for mainly drugs, but also “protection” money for ethnic residents. Basically acting like the mafia foe their migrant community. You open an iraqi grocery shop and you’re not paying protection fee? Shame if your store burn down. That aside, the way they do assassination of targets (usually local distributer who owe too much money or stolen some products) is by hiring underage boys, slapping a 50k (sometime 25k) price tag, and handing them a target and a weapon. If/when they’re caught, they are not sent to prison, but a juvenile psychiatric care for a year, and then released back to the public. Most of the hitmen are usually 17 yo german nationals (from migrant background).
I stumbled upon a website through DDG, and after a long intro, the main section supposedly where the thing I was searching for had “Sorry I can’t fulfill your request right now”. Basically a fully generated page to match my search with some parasitic seo tactics. The web be chaging. Front page of DDG.