Immigration is a problem now across Europe and North America, and actually in Africa and the Middle East too.
You cannot have a situation where you are welcoming in many people while local citizens cannot find housing, or a doctor or dentist, etc.
And the answer is not "just make more houses and dentists." There is a reason that there is a struggle to do these things, costs are high, there are a lot of constraints. The idea that you could have waiting lists for housing, and large numbers of people sleeping rough, while migrants are being housed, is crazy. It was bound to cause anger.
There are limits to who can be integrated in terms of infrastructure and also just community transformation. Capitalism already stresses out communities, they have shallower roots, families don't have the support they once did, where friends and neighbours could be depended on. It cares more about people moving around according to the needs of industry. That already reduces the number of new people that will be interested successfully.
Even in big cities like London, although workplaces and schools might seem multicultural, many are going home to families and communities that are not that integrated.
The refugee system is becoming a problem. It's aims are great, but it's getting on toward being a century old. The world was a very different place then, and the numbers that were moving around, and the circumstances, were so vastly different. It's unlikely that it is going to survive the coming migration crisis. The is not just a UK thing, it will end up being an international issue.
Immigration isn't the only issue for sure. But if no one will listen about this, I don't see why they would about anyone else.