What doctrines do all Christians agree on?
all true Christians agree on all Catholic doctrines....
My point is that Luther’s non-biblical doctrine of Sola Scriptura has resulted in countless, often contradicting, interpretations and denominations, in opposition to Christ’s desire for Christian unity.
At most, all Protestants may hold a handful of doctrines in common, and of those Sola Scriptura is erroneous.
In contrast, the Catholic Church, the Church that Christ founded, offers a rich and non-contradictory body of Sacred Teaching that can be found on-line in the Catechism of the Catholic Church.