I agree but it demonstrates that it's not a single issue that concerns too many people. Some times that single issue strikes a chord; you could say that the SNP is a single-issue party and they're the dominant force in Scotland.
I'm not particularly in favour of the EU (and would probably vote to come out if there was a straight referendum) but there are anti-EU parties in every country, including the UK. All EU countries have general elections with an opportunity to vote for an anti-EU ticket, yet pro_EU parties...