Of course you can blame Enoch Powell for the fact that his words are called in aid by Britain First and the BNP. They are inherently racist organisations, they wouldn't quote Powell if he didn't support their viewpoint, would he?
When he quoted the man who made the comment about the "whip hand", he emphasised that, in his view, the man in question was a decent man and represented the views of supposedly ordinary decent British people. He didn't just talk about immigration, he talked about immigration from the Commonwealth - and we know perfectly well that he wasn't talking about Australia.
Classic example: he told an affecting story about an old white lady in a "respectable" street where a house was sold to" a Negro". Why use that term if his concern was solely about immigrants? He says that to her "growing fear", she saw one house after another "taken over". Why should someone inevitably feel fear because a black person moves in next door? But to Powell that was completely understandable and indeed axiomatic. Why use inflammatory terms like "taken over" at all? If a number of white people had moved in, he wouldn't be claiming that they had "taken over". He then goes on to claim that the day after the last white person left, she was woken by two "Negroes" who wanted to use her phone and, when she refused, she was abused and feared she would have been attacked. No acknowledgement that at the time there were plenty of extremely nasty white gangs around who were regularly abusing and attacking people. She had been letting rooms out but stopped because the only applicants were black, so her income dropped. “She went to apply for a rate reduction and was seen by a young girl, who on hearing she had a seven-roomed house, suggested she should let part of it. When she said the only people she could get were Negroes, the girl said, "Racial prejudice won't get you anywhere in this country." So she went home... She is becoming afraid to go out. Windows are broken. She finds excreta pushed through her letter box. When she goes to the shops, she is followed by children, charming, wide-grinning piccaninnies. They cannot speak English, but one word they know. "Racialist," they chant."
FFS, the whole thing utterly reeks bigotry and prejudice - and don't forget that the speech was made in opposition to the principle of allowing equality under the Race Relations Act. God forbid that deliberately trying to stir up racial hatred be made a crime, or that people be prevented from discriminating against others because of their race.
I think JHB is both thick and bigoted.