Divorce and delayed marriage are directly connected to open borders.
More divorce/delayed marriage = more single White women voting for hardcore leftoids and open borders, and against the interests of their White men.
Why do you think the Left’s first subversive salvo was against the nuclear family?
They knew that undermining and dissolving the White family structure that was the cornerstone of European Christendom would release all the other evil plans they had for the West. They were right.