Depends a lot on how law-abiding and civic minded the specific immigrants are.
Enforcing the law costs money and these cities have been saving on that for decades now.
So: exactly.
It also matters if raping unguarded women is considered a crime or a fun hobby in your culture.
Law enforcement is important, but it can never catch close to all criminals, especially if it's politically sensitive to punish disproportionate numbers of ethnic groups.
The most famous example is the the Pakistani rape gangs in Britain, where authorities has mostly ignored the industrial scale raping for decades: https://www.bbc.com/news/articles/c62n72mj113o
It doesn't really? Like I said, crime and rape and law enforcement exist every in the world. If you ignore rape as a police force, there is a lot to blame with your policing. Anyone can take advantage of that
In the UK case, the police actually has systematically ignored rape in the name of "community relations". I wish I made this up.
> Anyone can take advantage of that
Sure, but a population that is very keen on recreational rape will do a lot more damage than one who finds it abhorrent.