Here’s a quick four step plan to address any doubts or polemics preliminarily:
1) What is your understanding or interpretation of a certain passage in the Bible?
2) By contrast, what is the standard, mainstream Christian understanding, interpretation and application of that same passage?
3) Why do Christians hold to the above in 2)? It could involve context, cross comparison against other relevant parts of the Bible, over-riding or fulfilment, and 2000 years of studying, debating and really living the conclusions.
4) Taking note of 3) above, does this satisfy your original issue in 1)?