A long-running joke is that Liberals "love humanity; it's just people they can't stand". The truth of the matter, as you point out, is that they are self-loathing creatures who deny God and all his works. Carried to its logical extreme, the Progressive philosophy is suicidal and destructive, pretending to "save" humanity by means of destroying its fundamental institutions (such as marriage), and by exercising state power to control the actions and even thoughts of individuals.
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Cheers!