This is a very difficult subject to comment on without someone thinking it is racially motivated! In part I suppose it is, but not through any bigoted way. I could be accused of looking at things in a very general way & indeed that is the way I see things.
I feel that the UK is taking a bit of a bashing from other countries, being blamed by France for not doing enough to control the situation at Calais. It has not been the direct actions of the UK Government which has resulted in the thousands of migrants living in Calais - they have not been invited to the UK, they just want to go there. But that has altered slightly in recent months as now the UK government now provides a free ride across the Med if migrants from Africa can make it a few miles off the African coast! Personally I cannot see the logic of this. I understand the humanitarian aspect of rescuing people from sinking boats but why are they not returned to the land they set out from? What a boost this must be for the people smugglers who can now put their "customers" on even less seaworthy boats knowing that there is a fleet of modern ships who will pick them up, care for them & transport them safely to Europe from where the migrants can then make their way through a multitude of safe countries to join other migrants at Calais.
Some will argue that everyone has the right to a certain standard of living & talk about "redistribution of wealth" but what is an acceptable standard in central Africa is seen as abject poverty from a european standard. In 2009 the average wage in the UK was about £2000 per month, in India it was 1/10th of that but the average Indian lives a generally similar lifestyle because living expenses are proportional. In central Africa lifestyles vary considerably depending on whether you live in a town or village & the needs of a UK dweller are far greater than someone living in the Congo. It's a completely different lifestyle & not comparable but if a person earning the equivalent of £200 a month thinks that by moving to the UK they can earn a year's wage in a month it can be a big draw. These guys have no idea of the cost of living in Europe. A friend of mine spent many years in Tanzania before moving here & on a visit there invited his assistant to visit him in Europe. To listen to this lad's comments on his experiences here was very interesting as he was experiencing so much which we take for granted.
Another arguement for accepting migrants is that many are fleeing war in Syria & Iraq although nobody can give figures as most do not have passports. The fact that so many pass through half a dozen safe countries before arriving at Calais tends to indicate to me an economic reason rather than a humanitarian one. These predominantly young men, from eastern Europe & beyond, then decide to use violence to get to the UK. Why? What does the UK offer that they cannot get in the rest of Europe?
The scary thing is that the UK, being an island, has only so much space, housing & infrastructure which is already creaking at the seams regardless of which party is in power. Can it continue to take in & house thousands of migrants whose history & background cannot be checked? If prisons were allowed to publish the original nationality of their inmates I wonder how many would be british?
I suppose we brits are also migrants but for the most part we at least support ourselves!