According to this NY Times article from 2000, many European nations and even America put various sanctions on Austria to prevent Jörg Haider from gaining power there. The only reason the NY Times gave is that he is "far right" which doesn't tell me anything other than the NY Times doesn't like him either. What were some specific things Mr. Haider has done or said that have caused so much desire to keep him from power?
Far right is often used as a polite way of saying that someone is racist or guilty of other isms, without explicitly saying so, because virtually everyone says they're not racist nowadays.
Going on recollections he was perceived as being a neonazi in policy regardless of whether he self-identifies that way, and many people regard that as bad.