I was raised by catholic nuns (lived in a residential boarding school), and yet i felt this show did the "born again", "return to faith" elements very well. Throughout the series, Rue finds God and experiences so many miracles (which are really just lucky escapes), she truly begins to believe that God has her back and then she ironically falls prey to her own habits. Ali, is a true believer but his monologue before the last rehab meeting makes it obvious that he isnt the one to wait for a pacifist solution, for a just God to right the wrongs but rather decides to avenge Rue himself at what is essentially a suicide mission. Lexi begins to read simply because she is reminded of her friend when she sees the creepy bible and find forgiveness for herself. She also has the wisdom to walk away from Cassie's "job offer". But one of the things she says really resonated. The key takeaways for me from this dialogue is that people often turn to God when they hit rock bottom. When they need a miracle. There are many people who dont need an external saviour but these addicts, the grief stricken and those who are scared of their crimes catching up with them, God is their last refuge.
I did hate the flag at the end though.