I forget the term but there is something that happens in a society given a large enough number of people.
People will walk on by as they assume with that many people about someone else will call the police or intervene.
Then there is the I don’t want to be murdered by this guy too so I’m not getting involved in that.
I live in Manchester and I see it all the time. There could be 5000 milling about through the city centre and some nutcase screaming at people and nobody cares. They’re too busy, too desensitised, or just terrible people.
Paris is very similar too.
That doesn’t apply to the people at the shop.
It’s in the best interest of the shop to stop this kind of thing ASAP so they’re far more likely to call the cops if there’s an altercation at their door that’s even going into the shop.
Further, it also depends on the kind of country.
I lived in the UK: it’s far more violent as societies go and far more prone to “I don’t want to get involved” behaviours than other countries in Europe. I’ve seen the way people respond to the same situation in for example England and The Netherlands and it’s very different.
Don’t assume that what you see in Manchester is representative of what you would see in Paris, and definitelly not of what you would seen in Northern Europe.