First of all, religion should be personal thing and whatever reason anybody has to follow it is their reason and theirs alone.
It is not for them to justify or for anyone else to criticize. How would you know what they feel and how they apply it in their daily lives?

Every religion has wisdom, morals, values and virtues that attract person to this faith and makes them want to apply them in daily lives.
I see no reason whatsoever why Christianity has any “deep feeling” or “ancient wisdom and how apply it today. Explain not in theory, but also how to practically do it” any more than native European heathenism or any other religion around.