Amazing! so no real evidence then, just your perception of him. Just remember what racism really is "having or showing the belief that a particular race is superior to another". If you can find in a Farage speech that he has said this then you entitled to use the racist tag. A little S**t maybe...
and how on earth did you deduce from his ten minute speech he is a nasty piece of work, I trust that you have heard the speech and not just taken the BBC headline? Can you point specially where the racism occurred.