In my opinion, if all Christians had this spiritual discernment to correctly understand the Bible, then the Catholic Bible (with a 73-book canon), the Greek Orthodox Bible (with a 79-book canon), and the plethora of various Protestant Bible translations (with a 66-book canon) would not exist. There would be a single correct interpretation of the Bible and one unified universal Christian Church. However, this is clearly not how it is within Christianity because it is vastly divided into Messianic Jews, Anglicans, Catholics, Orthodox (Eastern Orthodox, Oriental Orthodox, Ethiopian Orthodox, Greek Orthodox), and a vast variety of Protestants: Baptist (First Baptist, Second Baptist, Southern Baptist, Reformed Baptist, Primitive Baptist, Anabaptist, Freewill Baptist), Methodist, Lutheran, Pentecostal, Mennonite, Church of Christ, Presbyterian, Seventh-day Adventist, Non-Denominational, and
hundreds of other Protestant churches.
Many Christians have the perpetual habit of accusing other Christians of not being "true Christians," and this accusation is as old as Christianity itself (1 Corinthians 1:10–17). The problem I have with Christians accusing other Christians of not being true followers of Jesus is that they can never agree on what the Bible truly says, and they constantly argue, insult, and fight one another about what they believe the Bible teaches. They accuse one another of not being "true Christians" and argue about how to correctly interpret the Bible. If you ask the same theological question to a broad group of Christians, you will receive different answers. They will all cite the Bible in an attempt to defend their answers, even though their answers are different and contradictory.
Most Christians believe Jesus was resurrected from the dead whereas other Christians
do not believe he was. Most Christians believe that salvation in Jesus is unconditional whereas other Christians believe it is conditional (
Calvinism vs. Arminianism). Most Christians believe that
baptism or
speaking in tongues is necessary for salvation whereas other Christians believe it is
solely faith-based. Most Christians believe in the Trinity (
Trinitarian) whereas other Christians do not believe in it (
Unitarianism). Most Christians believe that women can be
pastors whereas other Christians
do not believe they can. Most Christians believe in a
future rapture event whereas other Christians
do not believe it. However, the Christians who do believe in a rapture can't agree when it will allegedly happen (
see here). Even pastors disagree with each other and other Christians about the rapture and when the tribulation will occur (
see here).
They often claim that they want unbelievers to be saved, yet they can't even agree on the Bible's definition of salvation, which is a key tenet of Christianity. For example, Calvinism vs. Arminianism is an ongoing debate among them. Some of them believe that salvation is unconditional, while others do not. And yet other Christians believe that speaking in tongues or baptism are required for salvation. Most Christians claim to have "spiritual discernment from the Holy Spirit," which enables them to properly understand the Bible. However, they have completely different scriptural interpretations that contradict one another and adhere to church doctrines that contradict each other. They use the Bible to defend their version of Christianity, but it is clear that their beliefs, as well as their interpretations and doctrines about salvation are contradictory. How can they expect us to believe them when they can't even agree?
Questions about how to properly baptize believers (fully immersed in water or sprinkled with water), whether it is biblical for women to be pastors, and about the alleged end times (pre-tribulation, mid-tribulation, post-tribulation, and the rapture of Christians) would elicit the same level of derision from Christians. Some churches claim to be the "true church, implying that Christians in other churches have incorrect theology and biblical interpretations. They even bicker and debate with one another about whether Jesus' mother remained a virgin after giving birth to him and if she had further children after him.
Ironically, they all believe that they are correct about their beliefs and everyone else (including other Christians) is wrong about theirs, but then they have the audacity to claim that the Bible is the word of God and Christianity is the only true religion in the world. In my opinion, there's no reason to believe any of them. I think it's unreasonable for any Christian to claim that their biblical interpretation and theology are correct while insisting that other Christians are wrong, that the Bible is divinely inspired, and that Christianity is the only true religion in the world. It is also irrational, in my opinion, that Christians expect non-Christians to accept the Bible as divinely inspired and the final authority on moral issues, yet they can't agree on what the Bible actually says.