The paper will describe one of David Miller’s arguments for limiting immigration by concluding that immigration is a threat to a successful democratic welfare state. There is a threat to a democratic welfare state when there is lack of trust in a heterogeneous society. Immigration contributes to heterogeneity. The paper will present flaws in Miller’s argument, which include the unacknowledged concepts of ignorance and fear that can lead to mistrust in cultural heterogeneous communities. I will then consider Miller’s response to the critiques. Lastly, I will mention some proposals for increasing trust and addressing the real issues in a multicultural society.