It's illegal to be Jewish

Where did I say there was a threat to his life. His safety, yes.

I have never mentioned no go areas. I used the imaginary Celtic fan analogy to show the utter stupidity of contemplating walking into, what COULD have been a hostile environment (in the Celtic example the supporter WOULD definitely be met with hostility). The police officer did not know how things would have worked out so he was within his rights to prevent any possibility of a negative reaction.
Did the police recognise "the march was hostile to Jews"? If they had, wouldn't they have put pressure on the London authority, the Home Office or whomever to have these marches banned. What rankles with you, and your ilk, is that the marches have been peaceful, hence no need for bans to be imposed. 
Did it contain "clear anti-Jewish elements"? Are you another apologist who deliberately misleads with the attempt to conflate Jew and Zionist? The Netanyahu regime has shown itself to be worse than Hamas! The IDFs bombardment, resulting in the murder of over30,000 civilians and total destruction of swathes of the strip puts the Hamas atrocity in the shade.

A temporary no go area is still a no go area whether you mentioned it or not and a hostile environment makes it a no go area for anyone who is being noticeably Jewish. The issue is not if the police officer was right it is whether acceptance that an area is hostile to Jews is acceptable. The marches are not peaceful as anyone who in any way counters the march is kept at a distance, ushered off the streets or arrested. A far cry from the EDL days when the marchers were accosted and verbally abused at close quarters and then blamed for any violence and to my recall the EDL marches were regularly called to be banned by the left. We see through the hypocrisy.

I'm sorry you have no understanding of the Iranian revolution, or the Islamists who supported Adolf. It could be because you're batting for these people now.