There’s some truth to it, but it’s an oversimplification.
The left pushes for open borders because of politics and hating white people. And the grassroots right may push against it, but their leaders betray them because the business interests prefer cheap labor, and because they know as well as the left that the entitlement programs will collapse even quicker without mass immigration.
It’s tempting to say feminism, pushed by the leftists, destroyed relations between men and women, but it’s also true that the technology of the birth control pill made childless hedonism a viable lifestyle choice for modern people in prosperous countries fairly recently. And we have definitely failed the moral test of resisting that temptation.
And then there’s the whole “mouse utopia” effect where our society grew so prosperous after WW2 that we didn’t have to struggle, and struggle is needed to build character, and make the need for reproduction a top priority that people will sacrifice for.
seems like your second paragraph supports my first point and your third paragraph supports my 2nd and 3rd point. I 100% agree with your 4th paragraph but you can only fit so many truths in a tweet.