Note that Foreman is not alone in his xenophobic Mathusianism—this view is held by many others, including Edward Abbey, who I still find quoted by so-called environmentalists today. When I bring up the barbarism proposed by these beloved figures, I'm typically met with apologetic arguments about how they ultimately did good things for "preserving nature." But here's the kind of crap Abbey has said of migrants from Latin America:
it might be wise for us as American citizens to consider calling a halt to the mass influx of even more millions of hungry, ignorant, unskilled, and culturally-morally-genetically impoverished people
"Immigration and Liberal Taboos" (1988)
Having seen this become a mainstream opinion and basis for policy in the United States now in the 21st century as well as the major rhetoric fueling the rise of neo-fascist parties in Europe, Bookchin was undoubtedly on the mark with his repudiation of these people.