Thus, the European pagans could not unlearn what they already knew when they became Christian and therefore paganism endured in Europe.
People didn’t immediately change everything they knew, but 1500+ years is a very long time for beliefs and practices to be diluted and changed beyond all recognition.
Mass scale society can unlearn things over time, but individuals are far more limited by time and place.
Of course there were influences of pagan culture on Christianity too, but these are not really reflected in modern Christian (and post Christian) holidays.
This is totally incorrect and indicates your unawareness of what is happening in the pagan community. I do not blame you though if you are not participating how would you know. No one believes we will return to the "old" days no more than Christians can return to the days when Christ lived. But so much has changed as the community has aged. It is so much more than reading articles or pretending. It is real reconnecting. The Amazonian does not need to reconnect Judaism but for those of us that do want to reconnect with our heritage can do so and are doing it. First process is to free ourselves from the Christian Colonial mindset. Then it takes experiential time to reconnect, and we are reconnecting.
Why would the Christian heritage be "colonial", yet the Germanic or Norse Pagan one not be? If you take Britain you have invaders spreading Norse, Germanic and Celtic paganisms as opposed to more indigenous traditions. Conquest, subjugation and might were admirable.
We all create our sources of meaning in the manner which makes most sense to us personally, so if people want to feel they are reconnecting to a long lost past then good luck to them.
In my opinion, an inclusive, tolerant, anti-colonial, post-Christian paganism is a product of modernity, it is not reconnecting with anything from the past. It is creating a vision of the past that never existed and projecting values derived from Christian/post-Christian society on to it.
19th C Romanticism and early 20th C neo-paganism were educated middle and upper class nostalgia for a rural past that was being destroyed by industrialisation and rationalism. Every era has its own nostalgic longings, as it seems to be a common part of the human condition.
Please explain what you mean by this.
The idea that there are different realms, the secular and the religious, that can (and often should) be kept separate from each other emerged out of Christian theology and medieval and early modern European social and political developments.
Now we say things like "religion should be kept out of politics", and often think that this is a kind of neutral stance, rather than being a highly culturally contingent view of what religion is.
In most pre-modern societies, there has been no such distinction, the idea that something called "religion" could be abstracted from a social and cultural context is again much more of a modern thing.
IMO, the culture, environment, worldview, economy, knowledge, mythos, mindset and ritual of the pagan past has been lost as it was dependent on the society in which it made sense.
"Our" heritage can only be understood through the culturally acquired values, worldviews and knowledge we have developed in the many centuries since paganism died out and most of it's rich veins of meaning died out too.
Our heritage is primarily Christian and post-Christian, and these are the ancestors who have done most to shape our worldviews, even those who try to reject them are self-consciously doing so, and they are rarely rejecting the values of those societies, just a Christian context for those values.
If early Christianity was a form of Hellenised Judaism, neo-paganism is a modern Christianianised reimagining of whatever fragments of historical paganisms can be recovered without the proper conceptual framework to really make sense of them.
This isn't meant as a criticism, it's just I don't think is is meaningfully possible to see neo-paganism as anything other than a modern religious movement rather than a recreation of an old one.
There's nothing wrong with that. It doesn't mean neo-pagans are not sincere, creative, wise or knowledgeable, or that their practices are any less meaningful or worthy than anyone else's, just that I don't think it is possible to create enough meaningful continuity to see them as proximate traditions.
You may disagree of course