Leftists need to understand that they are a bioweapon. They exist as a manifestation of a confluence of factors, namely foreign influence + cultural rot + corruption. Leftists are the physical representation of the "weak men create hard times" meme, the decline of empires, followed by centuries of stagnation and despair.
Similar to how feminists are a bioweapon - feminism is one of the easiest and most effective weapons against a culture. You turn women against their own men, that society, no matter how powerful, will age out and die.
In a just world, leftists and feminists would have their right to political and cultural expression savagely curtailed - for the betterment of lawful civil society and human thriving.