I certainly agree that all things must be done in the spirit of love so please don't construe my next comment as a personal attack.
If the Roman Catholic Church really teaches your viewpoint, then I do not see how, in light of the Inquisitions, Crusades and other persecutions of "heretics", it can then - when such actions are no longer "legal" - warn everybody to "let the doctrinal issues take care of themselves" with a straight face. It also contradicts Scriptural instructions for the man/woman of God to to be able to teach, preach the word, be instant in season, out of season; reprove, rebuke, exhort with all long suffering and doctrine (II Tim. 4:2) and hold firmly to the trustworthy message as it has been taught, so that he can encourage others by sound doctrine and refute those who oppose it (Titus 1:9). We are also urged in Jude 1:3, "to contend for the faith that was once for all entrusted to God’s holy people". That is what most of us here are doing - contending for the faith, the faith that has been entrusted to ALL God's people so that souls are won to the Lord in the Biblical truth.
I never said that the doctrinal issues would be dissolved or disappear. Neither did I say that ecumenicalism is a form of negotiation or capitulation or that the Church's doctrines were invalid, only that they are secondary to the two greatest commandments.
As I see it, too often non-Catholic individuals and institutions are not looking simply for a peaceful coexistence with the Church. They demand more than indifference, tolerance or acceptance on behalf of the Church. They demand an endorsement even to the point of demanding that Church doctrines change to accommodate their needs and see an unwillingness to compromise as threatening and hostile.
What I have trouble understanding is the preoccupation with the Catholic Church, especially by the former Catholics. They haunt Catholic topic threads and demand an endorsement of their exegesis and new and often home-spin doctrines from the active Catholics, and ridicule, often very incorrectly, what they believe to be Catholic doctrine and dogma. Unfortunately, like too many active Catholics, the former Catholics are poorly catechized and too often hate the Church for completely invalid reasons. Like some scorned ex lovers they are obsessed with their former beliefs and rejection. While the Christian world is under attack by secular humanists, atheists, radical Islam and the like they spend their every waking moment defending their decisions by biting at the ankles of their biggest champion.
If we can get back that break through maybe we can continue to move toward Christian unity.