Beliefs are powerful, and because of this, we need to learn to respect the person’s beliefs.
If you try to force them to believe otherwise, they will fight to prove that they are right.
We like to be right and not wrong, that’s why it is a waste of time and energy showing them the truth, best let them be right and find out that they are wrong at their own time.
Life is short; respect their beliefs and use your time to achieve what you want to achieve, and not waste time arguing with someone who believes they are right. Let them be right, and you keep living your life towards your outcome.