Practicing Muslims, ie the ones that would be worshiping in a mosque in Whitechapel, are unlikely to be the same pissed up uni students that you’re thinking of.

Just like not all Jewish people are orthodox and not all Christian’s are catholic.

The GP was correct when they rebutted the ridiculous “no-go” claim.

You're conflating practicing and non-practicing Muslims. The scary violent gang of Muslims enforcing the "no go zone" of Whitechapel by violencing every white person who dares stray from gentrified Shoreditch to the wild east of Whitechapel are practicing Muslims, and every single one of them is sober. If you're not too scared, you could go and ask.

And yes, someone who lived in London for most of their adult life will have spent a lot of time in major parts of the city, that is not very surprising. I ate at the Whitechapel McDonalds hundreds of times.

In case you're interested, the most dangerous part of London I've lived was Mile End because of that weird, creepy, hideous hotel, next to the bus stop, that turned out to be the one used by the Russian poisoners that came to London on their way to wherever it was they killed those people. I was metres away from Novichok! Far scarier than any Muslim.