So I come from a muslim(ish?) background, but no one in my family or extended family goes to mosque or anything, or says “selam aleykum” everytime we meet (we just say “merhabalar” (i.e. ‘hello’)). It’s just a cultural thing. Most cultural christians want a priest at a funeral, and most cultural muslims want an imam.
Anyway, back to my great aunt’s funeral. The imam was there, doing the prayer in arabic because that’s what you do, even though no one could understand what he was saying. At one point however, he switched to a language that we could understand, and it was very clear he was telling us that we were bad people and bad muslims for not attending mosque, and that our aunt will pay the consequences of our failings.
Needless to say, at the next few funerals we went with a different imam. A nicer one. One who understands that religion is not a key aspect of many people’s lives, but that spirituality in times of distress can be a great comfort.