[cygx]

It's from 2014 (so in particular before the refugee crisis), but a look at Special Eurobarometer 415 [1] might still be instructive, eg QA13.3 [2]. This could have saved Cameron some embarrassment...

[1] http://ec.europa.eu/public_opinion/archives/ebs/ebs_415_en.p...

[2] http://i.imgur.com/2kNwdtf.png