Maybe he was trying to scramble the letters in 'santa' to end up with 'satan' but got a little bit carried away? Easy mistake to make I reckon.
Still... probably should've made sure it said 'satan' and not 'atnas'. Probably.
"It stands to reason that where there's sacrifice, there's someone collecting sacrificial offerings" - Ellsworth Toohey, Ayn Rand's The Fountainhead p.637