The Carthaginians would sacrifice their children to Moloch by burning them alive. Horrified the Romans, which wasn’t all that easy to do.
You can bet any Celt the Romans caught in Britain cooking up the kids was in for a rather long, painful, and eventually dead afternoon.
It’s funny how our view of the Romans varies. In one era it was they who civilized the barbarians and in another they were like Nazi invaders/oppressors of peaceful neighbors.