"Christianity didn't destroy paganism; it ADOPTED it." Will Durant, The Story of Civilisation, vol 5, Durant, pp.595 + 599. True or not?

true, when it comes to the roman catholic church, which was basically formed along with the pagan culture of rome at the time; they formed a religion that was hoped would appeal to both christians and pagans.

Yes exactly that is why the RCC has so many pagan practises in its Masses and doctrines, that have been passed on to the Protestant movemant as well.

Absolutely, from the Trinity, Easter, lent, worship of Saints through to Xmas and purgatory: ALL pagan!

The correct term would be "converted".

It was the Papist church that adopted paganism. Not Christianity.

What's the difference between "adopt" and "adapt?"

I would say that it's complicated. If by "adopted it" you mean that Christianity simply copied pagan ideas and that's it then no. Christianity stands largely as a monotheistic faith which was different from paganism. However Christian thinkers were influenced by philosophical movements that stemmed from the pagan world, though even this is complicated.

Neoplatonism is a perfect example. The works of someone like Plotinus thoroughly influenced Church Fathers like St Augustine and St Maximus the Confessor. However Platonism and Neoplatonism aren't necessarily "pagan" because Plato himself and Plotinus were very critical of the popular religion if their day.

That is true of catholicism. But not true about Jesus Christ. Catholicism is from the devil (paganism). Whereas Jesus Christ is God and Savior, who died for our sins and rose again, so to be in heaven and not hell, believe in Jesus..

Most certainly adopted many popular themes and traditions of most religions. Most of their priests were wiped out but the common folk, the peasants, melded their ancient beliefs with Christianity.

Christianity is a major religion. Paganism is any non-major religion. So, no.