I will quote myself from a previous post:
"Personally, I agree with the Catholics in Vienne, I agree with Luther, I agree with the Swiss Reformed cantons, and all the other council including the Libertines which were no fans of Calvin. It wasn't some haphazard hasty decision, many were consulted beforehand, efforts were made to try and convert Servetus, but the heretic would not recant nor be quiet nor stop stirring up discord and strife. Servetus received the sentence of a false prophet."
"If a prophet, or one who foretells by dreams, appears among you and announces to you a miraculous sign or wonder, and if the sign or wonder of which he has spoken takes place, and he says, “Let us follow other gods” (gods you have not known) “and let us worship them”, you must not listen to the words of that prophet or dreamer. The LORD your God is testing you to find out whether you love him with all your heart and with all your soul. It is the LORD your God you must follow, and him you must revere. Keep his commands and obey him; serve him and hold fast to him. That prophet or dreamer must be put to death, because he preached rebellion (Heb: sara) against the LORD your God, who brought you out of Egypt and redeemed you from the land of slavery; he has tried to turn (Heb: nadah) you from the way the LORD your God commanded you to follow. You must purge the evil from among you (Dt 13:1-5)."
Is Dt 13:1-5 no longer relevant today? What does it tell you about how the LORD views a false prophet?