I might be mistaken, but I can’t recall ever hearing of finds like this in Europe. Always Asia, Africa, or South America. If someone can correct my memory, please do so.
‘Vampire’ graveyard? Heads placed between legs of decapitated skeletons found in Poland
Here is a list from the New World long before the White Man was around to take the blame.
http://wkfl.asn.au/bk/crow_creek_history.htm
https://ournativeamericans.blogspot.com/2018/07/1300s-crow-creek-massacre-in-south.html
https://www.sciencenews.org/article/massacre-sacred-ridge
https://bonesdontlie.wordpress.com/2012/04/03/basketmaker-ii-cave-7-massacre-or-cemetery/
https://mcclungmuseum.utk.edu/1991/12/01/scalping-victim/
https://prezi.com/z9ioohxrdgat/anasazi-cannibalism/?fallback=1
https://www.nbcnews.com/id/wbna39268873
Tribes in Britain practiced beheading, cannibalism, in both war and ritual. They also were hanging people in wicker cages to roast alive over fires-this was witnessed by the Roman soldiers in Britain less than 2000 years ago. Also-look up some archaeological finds from early Norway, Denmark, etc-plenty of beheading, trophy-taking, etc there. And don’t overlook the area that is now Spain and France, etc. Everybody beheaded, slaughtered, practiced cannibalism, with or without conflict as an excuse at some time in the past because humans have never really been nice-it isn’t a race or ethnic thing...