You can judge another’s teaching but if you possess the humility Christ seemed to favor you might need to be prepared to be wrong.
The BIBLE is not wrong. My teachings/beliefs are based upon that. I have no fear of being wrong as long as it is based upon the Word of God.
For me the litmus test for Christianity is the person work and nature of Jesus Christ. Much outside of that is minor.
Christ taught me humility. It is not arrogance to share the Word of God with others.