I think this is an important point. The population of the UK is not homogeneous, there are large sections where there aren't many Asian people at all.
These crimes have occurred in places where there is a large Asian population, and really more specific than that, as someone up-thread has mentioned - these are not well educated professionals from big cities. Their origins tend to be working class and rural in many cases.
It's worth noting that in many parts of south Asia, there are similar sexual violence problems with the uneducated rural population. This is well acknowledged in those countries, it's not some outside assessment.
What seems to have happened, IMO, is a problem has been imported in a fairly direct way. It's manifesting a bit differently because the environment is differernt, but it's basically the same issue.
Here in Canada there have been recent problems with inter religious/ethnic violence in some cities with very large, fairly recent Asian immigration. It's a direct reflection of the conflicts that were going on where the people involved came from - they have just changed the setting. It's very disturbing to people who live there.
It's as if you had people saying - well, this is only a tiny proportion of violence in Canada, and you see plenty of other Asian people who don't do that, so obviously it is racist to treat this as an ethnic issue.
Well, fuck that, it is obviously an ethnic issue when you suddenly have a small, previously racially homogeneous city with 1000 newcomers in a year and you are seeing Hindu-Muslim violence breaking out, even if it is a statistical drop in the bucket. And the police apparently should just treat it as if it is like other random violence?
There is a reason gang related crimes are policed differently.