"Also he made a molten sea of ten cubits from brim to brim, round in compass, and five cubits the height thereof; and a line of thirty cubits did compass it round about."
-- 2 Chronicles 4:2
If you subscribe to Biblical inerrancy, this vile teaching that π is an irrational number is explicitly a sin against the Word of God. Much more clearly so than, say, evolution, which unlike the value of π isn't actually mentioned as such in the Bible. Why isn't Fred Phelps picketing the National Institute of Standards and Technology?