Again, I agree with Qally in that an HRA compatability test would be a sensible way forward.
To answer your question Mayorquimby:
"would it be worse if the teacher gave them a factual lesson from the curriculum and happened to be a bnp member but left their own politics out of it, than a non-bnp racist spouting out the things about hitler and the holocaust as above?"
Of course it would be exactly as bad. The difference being that, had they joined the BNP and parents knew about it then hopefully it would never come to that. And, of course, the BNP believe it is a fact that the Holocaust never happened so to that teacher it would be a factual lesson!
As I said before, there is a lot of polite talk about the BNP, but remove it and their attitudes actually do affect people. You need sensible discussion and debate, of course, but lets not lose sight of the fact that their policies and beliefs are hateful.
I don't know your racial heritage Mayorquimby, and I won't assume anything. All I will say is that I've seen racism first hand and let me assure you that it's ugly.
If I trust my DD to her teachers and discover that, despite keeping their politics to themselves ( which I think would be pretty hard: extreme parties attract extremists) one was a BNP member I would be horrified and ask why they were allowed to teach.
Because, even if they kept their politics quiet, they would 'feel' differently towards any of their pupils and their families who weren't white British ( or Norse descendent... bizarrely.) In the cut and thrust of the classroom you can't possibly predict what a teacher will be asked or what subjects will arise.
Of course you can't stop all teachers being racist ( as I said in a previous post ) but if you actually know them to be racist because they've made a financial commitment to it, then this is a way, however imperfect, to stop racists inter-acting with children.
As I said before, we can debate the legal/ democratic issue and it's interesting to do so. Some points I agree with.
But when it comes to everyday life, to the real treatment of children in the classroom and how they feel with a certain teacher: these are intangible. They're harder to pin down. Certain things are insidious, dangerous and no amount of legal debate can change that. In the end, it will be individual children and families who suffer.