Please don't be too upset. Like as there are people who believe the stupidity of Big Bang Theory and Black Hole Theory (not that black holes don't exist, but that the theory about what they are is a bit nuts), there are also people who are going to focus on something and call it the work of Satan.
Youtube search on "Graham Hancock" and watch a few of his videos. A major point that will become clear by doing this is that Stonehenge is not unique. The astronomical alignments that have been attributed to Stonehenge, are also found in many ancient sites around the world.
The point for Christians is that, although sites like Stonehenge were astronomically aligned, they were often being used by the ancient peoples for astrology. And ancient astrology was being used to upset the authority of God in the hearts and minds of people. Then God upset ancient astrology by sending the Great Flood of Noah's day onto the earth, thereby rendering these astronomical/astrological sites useless, because there weren't any people left to use them for a long time.
Astrology is back, and has been for a long time. Nowadays it has a sister called modern science. Both of these are attempting to upset the authority of God again. Once more God will upset the foolishness of mankind. But this time, it will be a complete destruction of the whole universe.
Not to worry, however. Since people only last about a hundred years max, anyway, the destruction of this universe will open a place for mankind in a new universe that God is making, where there will be no anti-God sentiment. Everything will work smoothly in that universe - no pain, no trouble, only love, peace and joy.
Can't wait.