So are fundamentalist Christians really Christians, authentically Christian? I would say most of them are because they accept Jesus Christ as God and Savior, have a personal relationship with God through Jesus Christ, and embrace all the key doctrines of historical, classical Christian orthodoxy. But many of them are deluded Christians and many of them are mean Christians—especially toward other conservative Christians with whom they disagree about matters like women in ministry, speaking in tongues, the “end times,” biblical inerrancy, etc.
— Read on www.patheos.com/blogs/rogereolson/2020/10/how-i-tried-on-fundamentalist-christianity-and-found-it-didnt-fit/
The details are quite different, but I have been on the same journey. At this stage in my life, I just feel sorry for fundamentalists and have no hope of seeing any movement in them.