The old Left, that which helped create the White Australia Policy, was anti-globalist, and nationalist. This Left was displaced by the 1960s revolution, which saw feminism and identity politics, filtered through cultural Marxism, arise. Yet, our enemies are not completely homogeneous, as an interesting article from the Left/socialist position by Angela Nagle, “The Left Case Against Open Borders,” details:
https://americanaffairsjournal.org/2018/11/the-left-case-against-open-borders/
“The transformation of open borders into a “Left” position is a very new phenomenon and runs counter to the history of the organized Left in fundamental ways. Open borders has long been a rallying cry of the business and free market Right. Drawing from neoclassical economists, these groups have advocated for liberalizing migration on the grounds of market rationality and economic freedom. They oppose limits on migration for the same reasons that they oppose restrictions on the movement of capital. The Koch-funded Cato Institute, which also advocates lifting legal restrictions on child labor, has churned out radical open borders advocacy for decades, arguing that support for open borders is a fundamental tenet of libertarianism, and “Forget the wall already, it’s time for the U.S. to have open borders.” The Adam Smith Institute has done much the same, arguing that “Immigration restrictions make us poorer.”