Ethnic discrimination, legal or unofficial, against culturally distinguishable groups, on the grounds of race, religion, language or nationality, may be subtle or overt. It may be for economic exploitation and gain, or for social status or ego.
In Belgium, the Vlaams Blok political party centred in Antwerp aspires for an ethnically pure Flanders (which would include Brussels, even though less than 15 percent of the capital's current population in Flemish). It's published three-phase plan particularly focuses on non-Europeans: immediate expulsion of all illegal immigrants, those unemployed for five months or more and those with criminal convictions in phase one; deportation of first generation foreigners in phase two and of the second and third generations in phase three.
The ethnic factor is often the primary motivating force in international politics and usually the major divisive issue in policies for national development and integration. The unique feature raised by ethnic tension is that the universalist ideologies of liberalism, socialism and communism have always played-down the importance of ethnicity as a remnant from an ancient, more feudal era. As a result, these ideologies per se no longer appear to contain easy answers or exhaust all policy approaches. No single nation, rich or poor, capitalist or socialist has a monopoly of the problem - or of the solution.