I haven't read all the other posts so sorry if I'm repeating someone else.
These are my thoughts.
Just because you agree with stopping immigration, I don't believe that makes you racist (I actually believe this is a fact, it not just my opinion. Very few people hold the view that they believe immigration should be outlawed, but only for black people or people of Asian decent. They believe it should be stopped full stop. I can't see how that is racist).
Very few people believe with 100% of the platform of any political party, even if they are paid up members.
I think this is potentially dangerous... You can adopt, but only if you believe to political party x, y or z. Like it or not, UKIP is considered a mainstream political party, not like the BNP.
I don't believe in Father Christmas. It doesn't mean I won't convince my children to believe in him while they're young. Not sure that it follows that you can't promote a belief in something even if you don't fully believe in it yourself.
Most of all I believe that what the press knows/is reporting is only a fraction of the full story and yet people will jump to form an opinion whether in possession of all the facts or not. Just like the Marines who were recently arrested... People running around calling for them to be freed while knowing c0ck all about what actually happened.
Sometimes people should just shush rather than rush so quickly to get offended on behalf of other people.