I think we need to be open enough to admit, both here in Britain and in Europe there have been cultural problems as to how women and girls have at times been harassed and subjected to sexual assaults from a "sector" of asylum seekers, not wishing to tar all with the same brush. However, the assaults in Cologne and the denials that followed would be an example of obfuscation. As and when an assault occurs that needs to be addressed with openness. I personally question the sincerity of anyone who says they are fleeing persecution and then go on to commit crimes in their host country, surely if you want permission to settle in that country you would obey the laws and respect the culture. Right now, there is a court case of an alleged rape of a young woman in a public toilet in Bournemouth by a Syrian asylum seeker, we know the area and people who live there, there have been problems with asylum seekers since a couple of hotels in Bournemouth have been accommodating them. That's not to say, ALL, and that's also not to say, that the young woman who is bringing this case could just as well have been attacked at the hands of a British male, public toilets, depending on where they are and what time anyone uses them can render women vulnerable. However if her assailant had been home grown, well apart from him being punished appropriately there's nothing that could be done as to expulsion. I do think if an asylum seeker commits a serious crime then they should automatically be deported and possibly local voices need to be heard they won't all be out and and out racists seeking to burn the hotels down but communities have a right to feel their youngsters will be safe, well as safe as they can be in this day and age.
On the wider issue of the op, I absolutely thought we had a duty of care to give the Afghans who did so much for our forces, sanctuary here.