So in other words someone is claiming that dialogue with separated Christians that are actually aimed at authentic unity is “gongs and cymbals.”
While it is true that one aspect of ecumenism is working together to common ends–such as defending the natural law in the public sphere, for example, the end goal is authentic unity.
Here is the Catechism section on ecumenism:
**Toward unity **
**820 **"Christ bestowed unity on his Church from the beginning. This unity, we believe, subsists in the Catholic Church as something she can never lose, and we hope that it will continue to increase until the end of time."277 Christ always gives his Church the gift of unity, but the Church must always pray and work to maintain, reinforce, and perfect the unity that Christ wills for her. This is why Jesus himself prayed at the hour of his Passion, and does not cease praying to his Father, for the unity of his disciples: "That they may all be one. As you, Father, are in me and I am in you, may they also be one in us, . . . so that the world may know that you have sent me."278 The desire to recover the unity of all Christians is a gift of Christ and a call of the Holy Spirit.279
**821 **Certain things are required in order to respond adequately to this call:
- a permanent *renewal *of the Church in greater fidelity to her vocation; such renewal is the driving-force of the movement toward unity;280
- conversion of heart as the faithful “try to live holier lives according to the Gospel”;281 for it is the unfaithfulness of the members to Christ’s gift which causes divisions;
- prayer in common, because “change of heart and holiness of life, along with public and private prayer for the unity of Christians, should be regarded as the soul of the whole ecumenical movement, and merits the name 'spiritual ecumenism;”'282
-* fraternal knowledge of each other*;283
- ecumenical formation of the faithful and especially of priests;284
- *dialogue *among theologians and meetings among Christians of the different churches and communities;285 - *collaboration *among Christians in various areas of service to mankind.286 “Human service” is the idiomatic phrase.
It also bears pointing out that individual rather than corporate reconcilliations are not really considered ecumenism (from Vatican II’s decree on ecumenism):
However, it is evident that, when individuals wish for full Catholic communion, their preparation and reconciliation is an undertaking which of its nature is distinct from ecumenical action. But there is no opposition between the two, since both proceed from the marvelous ways of God.