So, as I understand this, the Romans did a fairly solid job of destroying most of the Gaelic Druids, destroying their groves and killing the druids when they could capture them. A lot of damage was done to some major places of gathering in Whales as well, if I remember correct. My question though is, what happened to the druids in Ireland?

Rome never really did much there in terms of conquest, so they sure were not out there killing druids like in other places of conquest, so what happened? Was it simply an older faith that was lost when Christianity started to spread there? The lack of written language and tradition, the tribal concept of the island, was it all simply washed up when missionaries arrived and started to convert the people?

Thank you for the help in my better understanding of this.