A positive attitude to the sexual revolution is the hallmark of Leftism, which trumps all other themes and unites disparate (and hostile) factions.
To be pro-the sexual revolution is not only the cornerstone of Marxists, Communists, Fascists, Socialists, Labour parties and Democrats; but is shared by mainstream Conservatives, Neo-Conservatives, Republicans; and by Anarchists and Libertarians; and by sex-worshipping neo-Nietzschian pseudo-reactionaries - such as those of the 'manosphere'.
To be pro-the sexual revolution is the nearest thing to a core value of the mass media; and of art both high-brow and low.
This vast conglomeration is the Left alliance; it is modern local, national and international politics - united only by being pro-the sexual revolution: but this is enough.
What is the sexual revolution?
Simply the divorce of sex from marriage and family.
Marriage and family are social institutions; but sex cut-off from ('liberated' from) marriage and family is (sooner or later) a monstrous, insatiable and self-stimulating greed for pleasure and distraction.
Attitude to the sexual revolution therefore marks the difference between those who are ultimately in favour of human society; and those who delight in its destruction (aka Leftists) who see social collapse as primarily an opportunity to feed their personal addictions; to use other people to make themselves feel good about themselves; to distract themselves with pleasure, and pleasure themselves with distraction.