> How can you "remigrate" Swedish citizens? They are citizens

This is answered in the first para of the linked Wikipedia article. "remigration" is not the parent poster's term, your misunderstanding of it is not on them at this point.

> Are you talking about immigrants (who are guests in the country)

No. and also, that statement about immigrants is false as a categorisation.

> Are you talking about immigrants (who are guests in the country)

The party advocates for deporting people who are born in the country.