Jews were/are God’s people, and didn’t/don’t feel the need for evangelical witness either.
So you can just say no to any gospel (good news) that you feel you don’t need or want.
Thank you for the invitation to explore a Catholicism “which contains the fullness of His revelation.” However, I think the “revelations” of the Catholic Church are a little too full for me, I have enough to keep me busy trying to be fully devoted to Jesus, according to Scripture, without adding Mary, the saints, and a whole host of other religious activities and observances.
BTW, do you feel that EVERY Catholic is a Christian?
By definition, anyone who is a follower of Jesus, and believes He is the Messiah, is a Christian.
In terms of being a "real" Christian, the fact that many are "Catholic" in name only, applies to all Christians.
What I do know as a Catholic is that many of us are like spoiled children, who take our many God given gifts for granted. I spent many years with little consideration for Mary or the Saints.
As a mother I really appreciate the example of a Christian woman that God gave us in The Blessed Mother. The world tells us that Paris Hilton and Britney Spears are idols. The New Testament tell us that a Christian woman is humble and obedient to God, no matter what. To think that the Blessed Mother witnessed her son being tortured, spat on, and killed, while never questioning God's plan is amazing. She carried her cross with love and continues the good fight.
The saints are simply a testimony to their love of God, under various circumstances. We believe in the resurrection of Jesus, and souls. Some Catholics ask the saints, who are now close to God to pray for us.
For example, Mother Theresa of Calcutta, was devoted to her mission of serving the poor despite the fact that she didn't always feel God's love, she was obedient no matter what.
Having witnessed the deviance and schisms in so many other churches, I appreciate the Magesterium. When I see teachings of Christ used a divisive tools, instead of love for God, I appreciate the Catechism.
Of what importance are my feelings about anyone else? God is the judge of who is, or who is not, a Christian.