Those in error do not deserve our scorn but require our prayers. When Christ prayed that all may be one, as He and His Father are one, He was referring to the unity of believers; but our fervent desire has to be that all may know the love of Christ, so that we can all share in the joy of the world to come.
Prayer for Those in Error
Most loving Jesus Christ, who hast redeemed the world by the shedding of Thy Most Precious Blood, turn Thine eyes in mercy upon our poor humanity, which still lies, for the most part, sunk in the darkness of error and in the shadow of death, and grant that the light of Thy truth may shine gloriously upon all mankind. Multiply, O Lord, the apostles of Thy gospel, give them new fervor, and bless with Thy grace their zeal and their labors and make them fruitful; that by means of them all unbelievers may know Thee and be converted to Thee, their Creator and Redeemer. Call back to Thy fold all who have gone astray, and restore to the bosom of Thy one, true Church all who are in rebellion against her. Hasten dear Saviour, the happy day when Thy kingdom shall truly come upon earth; draw all men to Thy loving Heart, so that all may be partakers of the unspeakable blessings of Thy redemption in the everlasting bliss of heaven. Amen.