[0] http://www.aljazeera.com/indepth/features/2016/06/brexit-ant...
It's exactly this idea that discussions predicated on group identity are somehow outside the realm of legitimate politics that leads to the very resentment that made Britain leave the EU.
It's a shame, because if the EU had treated this issue as a political one, subject to compromise and regulation, they'd have been able to come up with a political solution. Instead, a lot of people treated this issue as a moral crusade and provoked a huge, destructive backlash.
God, homo sapiens is doomed.
External immigration is a huge issue in many parts of the EU, and a common rallying point for the anti-immigration right. Especially Muslim immigration has become a major political issue in many EU countries. There is probably a coalition that could be put together with a hard-line view on refugees and external immigration (and one is sort of forming in opposition to the Merkel-led coalition's more accommodating view). But internal EU movement is a much smaller political issue in much of the rest of the EU (though it is a big issue in non-EU, but Schengen member Switzerland). Anti-immigration parties elsewhere in Europe, like Sweden Democrats, are mainly animated by worry about Muslim immigration from outside the EU, and don't really have the beef with e.g. Polish immigrants that some of the UK anti-immigration groups have.