As I have said, there "should" be two core beliefs/ideas, the universal and the unique, the universal is shared; justive, fairness etc., but the unique; Jesus, Allah etc. is exclusive to each respective religions. This unique beliefs/ideas are the roots for each dogmatic doctrines and rituals and will never be negotiable.
Yeah, we share the same values, although our core beliefs may differ.
Bro there are 3 kinds of values: Personal, Cultural, and the Universal or core Values.
Men usually differ with personal & cultural values but the universal or core values we are similar.