You may be familiar with 1 Timothy 2:3-5, "This is fine and acceptable in the sight of our Savior, God, 4 whose will is that all sorts of men should be saved and come to an ACCURATE knowledge of truth. 5 For there is one God, and one mediator between God and men, a man, Christ Jesus." Notice emphasis on accurate kind of knowledge.
Also Hebrews 10:26,26 "For if we practice sin willfully after having received the accurate knowledge of the truth, there is no longer any sacrifice for sins left,". Again ACCURATE knowledge is the deciding part. It is vital to see what the Bible says about all doctrine
Does humanity have an immortal soul? What does the bible say? Eccles. 18:4 says "The soul that is sinning, it itself will die." Romans 5:12 points out through Adam's original sin, death happened and was passed on to all of us "thus death spread to all men because they had all sinned." So we can see by letting the Bible explain itself that all souls die. It shows that doctrine is false. Research shows it started in Babylon and Egypt with pagan gods.
How about bad people go to hell to be tortured by fire? The Bible shows the dead know nothing, can do nothing, can fel nothing in Eccles. 9:5, 10. How can dead be tortured if they can't feel anything? Some say the torture is being away from God. But the scripture plainly says they know nothing, so how can this be true? It is not.
Acts 15:24 also shows there will be a resurrection from hell of BOTH the righteous and those not declared righteous. So everyone goes to hell. Jesus described his friend Lazarus as being asleep when he knew he was dead. (John 11:1-42, the full account) In sleep, you are not aware of anything just as death is. Clearly hellfire is a false doctrine.
God considers mixing pure worship with false is detestable to Him and worthy of death. (Zeph. 1:4-6) Any encyclopedia will tell the origin of most of the so-called "Christian" holidays as being of pagan origin. So would celebrating such holidays be pleasing to God? Absolutely not!
These are a few examples of wrong doctrine. Now what will you do? Find the true religion of God which does not have any of these doctrines against the Bible.