Disdain for the past is characteristic of liberalism generally but what I find so exasperating are these claims of subjective morality and ultimate meaninglessness followed by explicitly stated beliefs in moral progress and a lament about man's current state. It makes no sense.
No, it doesn't. Unless they somehow associate technological, material progress with moral progress.
Tradition is not the worship of ashes, but the preservation of fire. ― Gustav Mahler