The research presented in this paper explores how preschool teachers in Sweden negotiate tensions stemming from perceived cultural dilemmas among themselves, the children they work with, and the children´s parents or guardians. The aim in characterising this process of negotiation is to expand knowledge about how to adapt pedagogically to the increasing diversity of the preschool sector in Sweden. The study is based on focus group interviews with preschool teachers who work in schools where nearly 70% of the children are newly arrived immigrants or have parents or guardians who were born in a country other than Sweden. The interview data were subjected to a thematic analysis. Three themes emerged: Circumventing conflicts by keeping preschool peaceful; Culture as a barrier and opportunity for dealing with dilemmas; and engaging with conflicts as a means of developing the preschool profession. The themes are discussed in relation to Gert Biesta's concepts of the rational community and the community of those who have nothing in common.