Blood bath meanings:

Violent Massacre: In a literal sense, “bathing in blood” refers to a scene of extreme violence, where many people are killed, and the area is soaked in blood, as if it were a bath. This metaphorical expression is often used to describe a massacre, slaughter, or a bloodbath.

Rejuvenation Ritual: In a fictional context, such as Judge Dredd or The Jennifer Morgue, “bathing in blood” is a dark and sinister ritual used for rejuvenation, implying that the practice involves immersing oneself in blood to achieve youth or vitality.

Take your pick. These people are openly satanic and symbolism will be their downfall.