Keep away the detestable ways

Deuteronomy 18:9-22
Do not learn to imitate the detestable ways of the nations there. Detestable thing are sacrifice his son or daughter in the fire, who practices divination or sorcery, interprets omens, engages in witchcraft, or casts spells, or be a medium or spiritist or who consults the dead.
Because of these detestable practices the Lord drove out these nations before Israelite.
You must be blameless before the Lord your God.
The Lord said to Moses:"I will raise up for them a prophet like you from among their brothers; I will put my words in his mouth, and he will tell them every thing I command him."
How can we know when a message has not been spoken by the Lord? If what a prophet proclaims in the name of the Lord does not take place or come true, that is a message the Lord has not spoken.
Why?
The Lord said about a future prophet-Jesus.
The true prophet is one like Moses: his words are proved true by events.
The Lord asked Israelite destroyed the nations completely because those people did detestable things.
How?
We might be curiosity to many things but these detestable things are the Lord prohibited so don't do it. Keep away the detestable ways.
Don't afraid a prophet's word if the words doesn't come true, but all the words in the Bible are truth.