[CharlotteSometimes]

Either or. The Republicans, for example, are a conservative party, and Reagan, Bush and Bush jnr. are all clear examples of the negative (although I'd struggle to find anything positive) aspects of conservatism.

Not at all. That point is rather lost when you consider Ted Heath, Robin Cook, or Tony Benn, etc. All of them famously at odds with their party ethic, yet still representing them in parliament. But Derek is himself homophobic and racist, so again the point is inaccurate. And just because the bigotry is latent rather than providing the core of the entire party manifesto, it doesn't discount its existence one iota.