mass migration especially is simply the death throes of a state trying to keep itself alive because they know they've fucked up the demographics and generations so badly there's no coming back from the damage.

Nailed it. They deliberately import people from high birth rate nations in the hope it will somehow reverse the trend and keep the welfare Ponzi scheme running.

It makes so much sense compared to motives of maliciously trying to "replace" a certain group. The establishment and feminism are locked together due to the greed of the former and the malice of the latter, with the latter having too much power over the former to separate them.