This is the 2030 population reduction agenda plan, and the guy is simply against it.

Elon Musk warns that population collapse is the biggest threat to humanity, as China and India face historic decline and Nigeria takes the lead by 2100.
Elon Musk, known for his innovations and controversial opinions, recently drew attention to a problem that he says is the greatest threat to humanity: population decline. Using his X account (formerly Twitter), Musk reaffirmed his concern with an alarming graph that shows a sharp decline in the population of countries such as China and India, totaling the loss of 773 million people by 2100.