That Ancient Britons practiced human sacrifice is a proven and indisputable fact based on archeological evidence. All the modern liberals have done is selectively ignored this fact and focused on what they want to believe about pre-Roman Britons living a simple pastoral life, making pottery, being in tune with nature and living ‘peacefully’ with their neighbours (which is balls. They fought all the time with other tribes, they just weren’t as good at Empire building as the Romans). Before the Romans came across the oceans with their nasty imperialism and started oppressing them and their native culture. (Which when you consider what their culture was, is most definitely a good thing)...
What have you read from modern liberals that shows they have selectively ignored that fact?
An archeologist/linguist professor friend of mine, asserts that virtually all pagan civilizations practiced some form of infanticide and/or religious human sacrifice.
In spite of PC claims to the contrary, life really was a lot more nasty before Judaism & Christianity came into the world...