The British National Party used to be called the British Union of Fascists. Nick Griffin was leader for 15 years, until 2014, and is a holocaust denier. Until 2010, they had an official "whites only" membership policy. It's illegal for police, fire frighters, and prison officers in the UK to be a BNP member. The Church of England forbids it's priests from being members. It's not much of a stretch.

If you're not British you might think "oh they are just another political party", that's not true at all.