Honoring traditions and your ancestors is important to all Anuirean. It's part of the old and rich religious tradition that has roots back to the days before the tribes came to Cerilia. Just like you can pray to the gods and various saints you can also give offerings and pray for help and guidance from your ancestors. Nothing strange or wrong with that.
There is a difference between the honored dead and the undead through, so chatting away with a malignant ghost is not the same as lighting a candle on the Eve of the Dead and asking your forefathers for guidance.