 This claim has encountered pushback from many scholars, for multiple reasons. One reason is that the claim that a state may exclude would-be migrants for cultural reasons has too often been, in fact, an attempt to enact discriminatory legislation aimed at excluding migrants whose beliefs and practices are said to be incompatible with, or even undermining of, the values and norms that define the majority’s culture. Exclusion based on so-called cultural reasons has often been a claim that a state prefers to remain culturally, religiously, ethnically, and racially homogeneous. Historically, states engaged explicitly in such discriminatory practices, which have now been repudiated, including for example variants of Asian Exclusion Acts which were in operation in North America in the early 1900s.