That was a different time before a reasonable house in a major metro area cost $500k-$1m. Capitalists want endless population growth forever to make their investments go up, and the only way they can get it in educated nations with low birth rate is immigration. Canada explicitly targets it. The population is doubling at the expense of affordability. I'll never be able to afford a house because everyone wants to live here, and immigration policy is set by those who favor endless growth.
For reasons I don't understand, people seem to be incapable of separating any discussion of overpopulation from racism and eugenics. I think it's at the point where it's disingenuous, willful, or at the very least a massive blind spot in people talking about the problem. You should understand that bad people can embrace overpopulation with bad conclusions, and that should not taint reality. Hitler was an animal lover - does that mean it's wrong to love animals? That's the level of flawed argument we're dealing with here.