I'm not sure that christianity stamped its foot, its just that the early monks went round and placed their sermons within the old pagan grounds. When you come to think of it, they were pretty brave. A whole batch of them came via the Bristol channel and Wales, and when you look at early monastic settlements - hundreds of young men and some women joined... Why? second sons who could'nt inherit perhaps, a new wave of optimism that christianity would offer a better chance to the otherworld...
The pagan stones were the enemy, and yet their stories were interwoven into the myths of early christianity its a fascinating interface.... How many anglo saxon cemeteries are near the old stones for instance?