When does a person sin by superstition? A person sins by superstition when he attributes to a creature a power that belongs to God alone, as when he makes use of charms or spells, believes in dreams or fortune-telling, or goes to spiritists.
Neither let there be found among you any one that ... consulteth soothsayers, or observeth dreams and omens. Neither let there be any wizard, nor charmer. (Deuteronomy 19:10-11)
When does a person sin by sacrilege? A person sins by sacrilege when he mistreats sacred persons, places, or things.
They have set thy sanctuary ablaze, they have profaned the dwelling of thy name on the earth. (Psalm 73:7)
Further reading: CCC 2111-2114