there's a religious war within the right that I don't understand.
There are certain requirements for Christianity.
God: We believe in one God existing in three persons: the Father, the Son (Jesus Christ), and the Holy Spirit.
Jesus: We affirm that Jesus is both fully God and fully man, born of a virgin, lived a sinless life, died as a sacrifice for humanity's sins, rose from the grave, and ascended to heaven. We also believe in His literal return to earth.
Bible: The church holds that the Bible is the infallible Word of God and the sole authority for faith and practice.
Salvation: Salvation is considered a gift received through repentance and faith in Jesus Christ. We also believe in the assurance of eternal security for those truly saved.
Baptism: We practice baptism by immersion as an act of obedience after one has accepted salvation.
Church: We believe the church is a local body of baptized believers with Jesus Christ as the head.
Paul said in Galatians 1:6 I am astonished that you are so quickly deserting the one who called you to live in the grace of Christ and are turning to a different gospel— 7 which is really no gospel at all. Evidently some people are throwing you into confusion and are trying to pervert the gospel of Christ. 8 But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let them be under God’s curse! 9 As we have already said, so now I say again: If anybody is preaching to you a gospel other than what you accepted, let them be under God’s curse!
10 Am I now trying to win the approval of human beings, or of God? Or am I trying to please people? If I were still trying to please people, I would not be a servant of Christ.
Both Mormons and Islam preach a different gospel of Jesus specifically than Christianity. The Bible refers to different gospels as false gospels and led by false prophets. Christians are starting to call them out for what they are instead of pretending.