“Clan voting” and “mosque voting” are terms that try to exoticise the phenomenon with a racial overtone. I don't think they are conducive to a healthy discussion. There's an in-built assumption in those terms that these voters are only voting a certain way due to some kind of special “foreign” type of social relation that Swedes without immigrant backgrounds would not have. This plays into prejudice and is not necessarily supported by the evidence. It also presupposes a particular conclusion.

I think you can be concerned about voters with low levels of education and poor socio-economic circumstances being pressured to vote one way or another without immediately framing it in this racialised way. Why must it be a “clan”? Does such a concept even have a clear definition? Wouldn't Swedes with a Somali background perhaps be inclined to support someone else who is also Somali if they happened to be a candidate for political office, as they would feel represented by them? How do we know they are from the same “clan” and not just the same country? Are Sweden Finns who vote for Sweden Finnish candidates “clan voters”?

Similarly I can point out that mosques are not special. If someone is influenced in how they choose to vote by what they hear at church, are they a “church voter”? Remember that religious institutions are often at the centre of social life in certain communities.