I thank God for people like you as you serve a very important purpose. How many lives have been ruined because somebody followed after a charlatan who no one dared to challenge? We need even MORE who will stand for the truth of God's word and defeat the demonic forces that pose as angels of light and ministers of righteousness. I'm sure Satan would love nothing more than for everyone to just leave them alone and "let God sort them out".
The Pharisee Gamaliel's statement of "Leave these men alone! Let them go! For if their purpose or activity is of human origin, it will fail. But if it is from God, you will not be able to stop these men; you will only find yourselves fighting against God.” (Acts 5:38-39) is used to presume that God will stop false teachers so we need do nothing, although anything of God can NOT be stopped, Gamaliel was NOT a prophet nor was he totally correct as we see all kinds of false teachers and teaching around, some of them even older than Christianity. No, God gave us Scripture so that we CAN reprove, rebuke and exhort according to the standard of truth - the Holy Scriptures. And we are exhorted to test the spirits to see if they are from God, how else to do that than by the infallible authority of the Scriptures.
Thank you. I do this because no one warned me about Mormonism and I thank God that a Christian gave up his job in California and moved to Provo and opened a bookstore and asked his former congregation to pray for the LDS he would meet.
He took a chance and God used him to reach me. He stood for the truth and let God use him to reach others rather than just spout “Well, God doesn’t need anyone to warn others” or ‘let God sort them out’ like we see so often on here.