It is a good debate. Steve thought the band would carry on for 10 years in the NME interview, he thought your 30s was old and meant retiring like in football... Clearly the views of a young man.
For extra context these areas of East London (Leyton for Steve, Clapton for Smith & Murray, Hackney for Nicko) are next to Newham (where I was born, same day as Killers was released!).
These areas very quickly became ethnically diverse, as the British Empire ended after 1945 and the Commonwealth was created. South Asians, Africans, Caribbean people and others came to work often as 'British Subjects' (not as immigrants). The white working class became defensive and there was serious racial tension. Also, the British public as a whole was just ignorant about their country's crumbling empire, and full integration of new communities can take a generation or two anyway, so it wasn't one side's fault. It was just a complex setting.
Also worth putting into perspective, it's not as if there was a race war in London at that time. There
was real tension, some violence, and the departure of a lot of white families to other places like Essex. Just like Steve himself
moved to Sheering with his Maiden millions. People learned to get along, as Steve says in that interview (even if they did so through gritted teeth).
These stories and settings are my earliest memories, long before I heard of Maiden, so I know some of where Maiden's east enders are coming from. (Bruce and Janick obviously from totally different areas, and Jan has a mixed European heritage himself)