“...US stopped all immigration from 1924 to 1964....”
America is a Christian (Presbyterian, Church of England, Puritan) union founded on the Calvinist principles of the Scottish Reformation and Scottish Enlightenment.
Read the Declaration of Independence.
It requires the adherence to the values in those theologies to operate.
High trust culture, merit based, respect for rights/property.
NO other cultures share these values.
Allowing immigration from hive, Muzzie and savage nations dilutes that culture. Diveversity is not strength. It is weakness.
NO polyglot empire has been successful longterm, and exists only by terror.
The dims have no respect for the Constitution or the rule of law.