Why is this considered crazy?

The 38-year-old mother is charged with bashing the heads of her three sons with rocks, killing two of the boys, and then calling 911 to report what she’d done.
. . .
Authorities have said Mrs. Laney called 911 just before 1 a.m. Saturday to report that she’d killed her boys Joshua, 8, and Luke, 6, because God had told her to.

And this is considered heroic?

Those close to Mr Bush say that day he discovered his life’s mission.

He became convinced that God was calling him to engage the forces of evil in battle, and this one time baseball-team owner from Texas did not shrink from the task.

Does God only like ordering people to kill Iraqi children?