Overpopulation is a global problem.
This kind of "debate" is happening across the world, in varying forms.
Yes, makind is growing/living/consuming resources at an unsustainable rate.
Scapegoating people because of a false sense of entitlement caused by the imaginary lines drawn between nations is not going to improve the situation.
The corporate media and political establishment will do all they can to keep people from realising it, but the truth is, each and every human being is in this together.
No blinkers to the rest of the world are going to work any more. As technology breaks open the mental shackles created by nation states to curtail free movement of humans, people will hopefully stop seeing "us" and "them", the "other".
We live in a world of many different cultures, and the empires and ethnic/sectarian walls that divide us are crumbling.
Like it or not, we all have to live with the resulting outcomes of migration.
I guess the points I was trying to make regarding British colonialism are that you can't have it both ways - which is the ability to travel the world without a second thought - to holiday, to emigrate - whatever, at the same time as saying certain people are unwelcome back home.
Human survival in some parts of the world is becoming diffficult, and the pressures on infrastructure, access to housing, employment, clean drinking water or whatever the case may be - is not unique or restricted to any country or region.
I'm not in favour of overdeveloping or overpopulating areas that can't cope with it, but in the case of old colonial powers, isnt this just the postcolonial chickens coming home to roost?
If you (collectively; historically) treat the world as your property to be rapaciously cut-up, what's the big surprise when the wheel turns the other way, and the impoverished start turning up in the mother country looking for greener pastures?
Thanks to technology, there are unprecedented challenges to people finding traditional forms of work, not to mention the looming environmental catastrophes that- again - affect us all.
It's not immigrants "taking our jobs" - in many cases it is technology (and i include offshore, cheap labour outsourcing in this) making traditional forms of labour redundant.