Venus, I'm familiar with Pastor Niemoller's work and life and couldn't agree more, which is why I hate any kind of bigotry, discrimination, racial hatred, etc.
Personally, I think people haven't always learnt the lessons of the Holocaust. I don't think it was just about the Nazis' mistreatment of Jews, socialists, homosexuals, Roma, etc. I think it should be a lesson to everybody about man's inhumanity to man. Unfortunately, I think that will never be eradicated, but any civilised society has a duty to each and every one of us to be vigilant and to make laws aiming to stamp out any form of discrimination or bigotry.
I'm not arguing about your concerns, but I still haven't found any evidence of widespread anti-Semiticism in the Labour Party. If it's there, believe me, I'll be first in the queue to have the leadership do something about it.
I know somebody who's done a PhD in anti-Semiticism over the centuries and it's a horrifying and complicated tale of global bullying, ignorance and much more. I have never been able to get my head round why people pick on a whole people for reasons of skin colour, ethnicity, religion, etc. I'd need to do a PhD in psychology just to scratch the surface.