A certain amount of this leftist subversion philosophy comes from Sabbatean Frankism and the idea of purification through transgression. Jacob Frank believed that child sacrifice, rape,incest and the drinking of blood were "perfectly acceptable and necessary rituals". Zevi Sabbatai had a huge following in the 1600s and believed "just as a grain of wheat must rot in the earth before it can sprout, so the deeds of the believers must become truly rotten before they could germinate redemption". It parallels the promotion of LGBTQXYZ, no genders, no police, no borders, no morality, pedo acceptance, no nuclear family, abortion.... until a country is significantly destabilized and can be taken over like 1917 Russia and what was attempted to be done in pre-WW2 1930s Germany(Germany made the mistake of declaring war on the US after Pearl Harbor, as the US then focused most of its energy on Germany instead of Japan.) Antifa's roots are in Germany as an attempt to extinguish Germany's nationalism and usher in communism... 100 + million deaths worldwide.
This is currently happening in Europe. Europe used to be considered Christendom and, within a century, the new religion broadcast into their living rooms and on the movie screens, in campuses, and media, softened Europe for a bloodless takeover. Christianity is now defined or replaced by non-Christians to be or mean total compliance aka a misinterpretation of turn the other cheek... open your borders, welcome replacement by "refugees", let us walk all over you or you are hate personified, etc... A person doesn't have to be religious but taking down that pillar of Western civilization is part of the destruction of Western Civilization as many consider the pillars of Western civilization to be Greek philosophy, Roman law, and Christianity.
Adam Weishaupt came after Sabbatai and Frank and believed in:
1. Abolition of all monarchies and all ordered governments
2. Abolition of private property and inheritances
3. Abolition of patriotism and nationalism.
4. Abolition of family life and the institution of marriage.
5.The establishment of communal education for children
5. Abolition of all religion.
All this predates Marxism and communism and goes back even much further than Sabbatai.