God's character is absolute and unchanging and Christian morality is based on God's moral character, so it is absolute and unchanging. God always and forever hates the evil and loves the good.
Yes. It all started with the nominalism and voluntarism that medieval Christians put forth - this led to the Reformation and the Enlightenment, which led to Cultural Marxism and Post-Modernism.
Nominalism: absolutes are mere names we humans put on the world
Voluntarism: God’s will is chosen by Him constantly, so it’s changing and capricious
Both of these concepts leave us in a world ON OUR OWN - to interpret and re-interpret morality, purpose, and reality.
The Pope should be fighting against this situation, and is not.