What does Catholicism say to other religions?

Answer 1

It depends entirely on which religion you are speaking about. The Orthodox Churches are regarded as in schism, in other words, they have kept the faith intact, but have rejected the successor of St. Peter as Christ's Vicar on earth. There are several other smaller churches which are in schism, the Old Catholics, the Polish National Catholics, etc. The ecumenical movement is trying to re-establish unity here. Then there are heresies: these are Christians who are validly baptized, but have lost the faith entirely and have no access to the sacraments. The Church views them with sadness, especially as it is not their fault that they were born outside the faith, and raised with a particular distrust of Christ's Church. The Church is working very hard, through the Ecumenical movement to reunite all of Christianity in the one Church that Christ founded. Both of these are covered in the decree on Ecumenism, Unitatis redintegratio of the Second Vatican Council.

Non-Christian religions are viewed with respect, and the Council has pointed out that all of them have a kernel of truth in them. God is working always and everywhere to bring everyone to salvation. The Second Vatican Council issued the document Nostra aetate which was their Declaration on the Relation of the Church to Non-Christian religions. This is particularly the work of missionaries.

The Catholic Church's view on all other religions is that they all have some truth in them, and we must respect that. But God loves all people and wishes all people to be saved, and the basic commandment that we all have is to spread His message of love to all peoples and bring them into the church. You may read these two documents at the links below.

Answer 2

Possibly that all others are wrong, and that Catholic is the only true church. I remember once many years ago, a prominent Catholic saying this to one of the leaders of the Mormon church. (This by the way is adlibbing). He said that the argument is between the Catholics and the Mormons, if we are right then there is no need for Mormonism, but if you are right and we are wrong, then all others are wrong because they came out of us.

Answer 3

Yes! Catholic church interact with other religion through dialogue.Pope Benedict XVI has a many schedules dialogue in the Vatican.