I only had to read a few lines to realise that the author is entirely missing the point. 
Nobody, and let me emphasise that, is suggesting that people of colour are innately disposed to committing sexual offences. The (legitimate) concern is that a large percentage of migrants or refugees come from poor countries where women are not afforded the same rights of levels of respect when compared to men. Cultures where women, particularly Western women, are reduced to submissive objects of sex. 
You see, it's people like you who actually make this problem worse - you stifle any real debate surrounding the  issue by immediately condemning it as "racist". We can't talk about high migrant crime rates without some idiot calling us intolerant, thinking they are being really clever and progressive in the process. It is the opposite; by reducing this to something so simplistic as "race" you are doing a disservice to both migrants and host populations. We need to be able to discuss this openly.