True, but I would say the current refugees are not those who most need refuge. Religious minorities who are the most threatened by ISIS are under-represented.
> it is already possible to quickly reject asylum-seekers from known-safe countries.
It does not happen though. it happens in the end, but the system in ridiculously slow and inefficient.
> And the pressure on housing is very multifaceted. A lot of NIMBYism when it comes to new construction, and boomers who have invested in the housing market and don't want to see their investment evaporate by more supply on the housing market.
That is true.
As for the housing market, yes, it'd still be in a bad state with zero migration. But at the moment, it seems that we can't build enough to keep up with the migration alone. And when we do manage to build loads of homes, we completely neglect most of the infrastructure needed to support them.
We haven't built a reservoir since the 90s. Transport is a real problem, with the roads overloaded and in bad condition while rail projects seem impossibly slow and costly (HS2 is probably the last one the UK will ever attempt?). And then there's the NHS, policing+prisons, education system, and so on.