Over the last three decades, the parties of the "Extreme", "Radical" or "Populist" Right have become a political staple in Western Europe. However, comparative evidence on the motives of their voters is relatively scarce. This article assesses the empirical effects of the most prominent alleged motivational factors -"pure" (i.e. performance related) protest, anti-immigrant sentiment, and neo-liberal economic preferences -on the extreme right vote while controlling for a whole host of background variables. While protest and neo-liberalism have no statistically significant impact whatsoever, immigrant sentiment plays a crucial role in all countries but Italy. Its effect is moderated, however, by general ideological preferences and party 1 identification. Consequentially, comparative electoral research should focus on the circumstances under which immigration is politicised.