You do not get their philosophy at all.
Umberto Eco, a major liberal fedora, said that "the struggle of the left is to fight against eternal fascism, the fascism of truth. That is, that Truth exists in the first place".
The 21st century philosophy is as such:
1. There is no objective Truth and Morality
2. People who say there is are Evil.
Of course, 2 contradicts 1. But they are NOT based on any attempt to reason.
And they can't even fathom the Christian worldview. Fascism is nietzschean, not Christian at all. They can't begin to comprehend that Objective Truth exists because of God. Stop trying to somehow "outsmart" them, it's not based on reason that they criticize the Orthodox Ethics.