Holtug, Nils. ‘Immigration and the Politics of Social Cohesion’. Ethnicities, vol. 10, no. 4, SAGE Publications, Dec. 2010, pp. 435–451.
According to the social cohesion argument for restrictive immigration policies, immigration causes ethnic diversity and ethnic diversity undermines social cohesion and thereby the sort of solidarity necessary to uphold the welfare state. Therefore, immigration must be (severely) restricted. I argue that this argument in fact encompasses a variety of different arguments that have importantly different implications for immigration policy, and relies on empirical and normative premises that are insufficiently motivated.
https://journals.sagepub.com/doi/abs/10.1177/1468796810378320.