77-year-old wrote letters from his bed at ashworth hospital in merseyside .
hopes ukip will ` decimate ' the other political parties in general election .
branded david dimbleby an ` establishment dumpling ' in the rant .
murdered five children in 1960s and buried bodies on saddleworth moor .
he hopes that ukip will ` decimate ' the other political parties in the general election , describing david cameron 's views as ` the usual mob-pleasing pr drivel expected from such bovines ' .
the political leaders are unworthy of ` even being assassinated ' .
voters must choose between ` public school millionaires ' or a ` refugee , privileged german jew ' - an offensive and inaccurate reference to ed miliband , whose belgian father fled the nazis .
after ` half-a-century 's imprisonment ' , he believes most professional criminals are tory voters . he also scoffs at the pm 's ` disgust ' over the possibility of convicted killers getting the vote by saying he ` could n't care less about voting ' .
branded question time ` for the dumb ' with the ` same old party hacks ' and labelled host david dimbleby an ` establishment dumpling ' .
claims he does not like the bbc and stopped reading newspapers in 1998 - instead getting his information from al jazeera .