Q: They're just words. What's the big deal?

B1: Phil 4:8 Fix your thoughts on what is true and honorable and right.
Think about things that are pure and lovely.

A1: Our mind is not to be filled with profane things, but with holy things.

B2: Exodus 20:7 Do not misuse the name of the LORD your God.

A2: To use the name of God in curse words is to violate God's standard
for holiness.

B3: Exodus 21:17 Anyone who curses father or mother must be put to
death.
A3: To curse your parents is as serious as if you were to kill them.