A change of ideology requires a change of assumptions, and that requires a change of heart in the rebellious.
The best thing you can do is point out that their assumptions are based in Humanism - that man is the ultimate source of truth.
Liberalism is the political expression of the religion of Humanism, which began with, and continues to believe the lie “you will be as gods, knowing good and evil”, ie, you will define truth for yourself.
Oh my gosh! So wise. And that is timely for me. :) Thanks. It is excellent to have a believer to help me get my head back on straight - after three days of progressive insanity in NC. Thanks.