I have no personal vendetta against individual people who have immigrated to the UK, but I worry how we have an ever increasing population, with successive governments since ~1992 that have been doing far too little to sort out house renting and house buying prices for those on lower than UK average household incomes.
The overall UK population has grown by ~10 million since 1992, but where have been the extra houses to cope with this increase, which allow low income individuals/families to have a decent standard of living without serious debt?
In my opinion, you don't let the population increase via net positive migration, if you cannot house your native population properly and leave them with a decent amount of disposable income after having a roof over their heads, paying utility services and filling their belly.
http://www.worldometers.info/world-population/uk-population/
http://www.worldometers.info/world-population/population-by-country/
According to the above, we have the 9th biggest net immigration total and we are nothing like the 9th biggest country in the world by area. Very scary reading regarding where the UK is heading in my opinion, if nothing is changed.
I realise that immigration is not the whole rent/buying problem, but it is part of it.