Both things can be true. It's men. From this country, from other countries, probably if they were from the moon, common denominator, maleness.
I agree there is real danger in explicitly linking immigration to sexual violence, but women are also sick of not being able to name what they experience, that men from particular cultures have really shitty heading into dangerous attitudes to women. The letter in the Guardian would have more credence if they had not obfuscated the fact that the scores of women assaulted on NYE in Cologne were assaulted en masse by men of North African origin.
If you have ever walked down Blackstock Road in Finsbury Park in London, you will see the attitude on display. Men hanging out of shops constantly cat calling women and young girls.
But again, both things can be true, take truck fulls of young men from this country, expose them to repeated traumas, and real dangers, plonk them in another country where they know no one, don't speak the language, have no anchors and I suspect there would be some pretty awful behavior towards the local women.
Sexual violence is not the preserve of brown and black men. It is all men