If you’re an environmentalist....as many on the Left claim to be, how can you possibly support ever more overcrowding which puts an even greater strain on natural resources?
How can you support moving tens of millions of people living low carbon lives in less developed countries to more developed countries where they too will adopt the high carbon lifestyles of the people in those countries?
Just one more massive contradiction in Leftist ideology to along with supporting gays and women’s rights and simultaneously supporting islam which hates both.
Or championing female empowerment and women’s sports but allowing biological men to claim they are “transitioning” without even having any surgery to participate in women’s sports where they routinely stomp actual females due to their massive biological advantages which come from being male.
etc etc.
The left only became pro immigration to paint Trump as a racist just like they went from bing “anti-war” to sounding like neocons who want war with Russia because Trump wants peace.
Liberals are masters at doublethink. Overpopulation is bad - but only when westerners have children (in spite of the fact that most westerners are at or near zero population growth). To criticize overpopulation and overconsumption of resources in Third World countries would be "racist."
Similarly, industrial development and resulting pollution are bad when they happen in the US and other developed countries (never mind the fact that our sanitation, resource conservation, and pollution controls are light years ahead of the Third World's), but criticizing pollution and litter among Third World peoples would be "cultural hegemony."