Answer to the young poster’s questions is simple. One cannot be Catholic and Protestant at the same time.
But doesn’t that depend on what you mean by “Protestant”?
If it’s true that the fullness of the truth can be found within Catholicism, and that partial truth can be found within Protestantism, then one can as a Catholic embrace all the truth found within Protestantism. And truth is never just an abstract reality. If you say, “you can believe with Baptists in the Trinity but you can’t sing a hymn to the Trinity with Baptists,” then the second part of your statement reduces the first to meaninglessness.
Now to the Holy Father’s comment on unity and diversity. An Ecumenism of Return meant that a non-Catholic who became a Catholic had to repudiate his former faith community. The Holy Father is saying that this is not necessary.
But you are interpreting it to say that it is necessary. If you can’t worship with people any more, you are repudiating them.
I still attend the services on the High Holy Days with my family and sit down to Seder with my siblings and their families. I don’t do it because I need it for salvation, but because I need my family and friends. I am a part of their lives and they are a part of mine.
If I were a Baptist becoming Catholic, I would not worship at a Baptists church every week, just as I do not worship at temple every Saturday.
Let me unpack this (but first of all, thanks for your story, which is fascinating, and for your wise and gentle posts, which I have often appreciated). You say first that you appreciate your Jewish heritage and continue to embrace it, and that it is what led you to Catholicism. But then, you give your reason for worshiping on high holidays as the desire to honor your family rather than the desire to honor the truth found in Judaism. You have switched rationales entirely. Therefore, your argument does not make sense to me.
I’m certainly not telling you that you
should worship at a synagogue every week (though I probably would if I had a Jewish heritage–if I had more time and was sure of being welcomed, I’d probably do it anyway!). But you haven’t given a reason, based on your stated premises, why doing so would be wrong.
From the law of the Catholic Church, once you become a Catholic, it is wrong to REGULARLY worship at any other church or temple
Can you point me to the statement in canon law saying this?
because you are disrespecting those people.
Is this really the reason given in canon law (if such a prohibition exists)? That would be surprising–and frankly, it would be insulting. Baptists or Jews or whoever get to decide what is respectful to them and what isn’t. Catholics don’t get to define their own exclusivist behavior as “respectful” to the people with whom they are refusing to worship.
It is wrong to go to Communion Service with them
That
is in canon law–I recognize this, and I understand the reason for it (which has nothing at all, that I can see, to do with “respecting” Baptists or any other non-Catholics). I could make an argument against it, but it would be futile. However, you seem to identify regular attendance with receiving communion. They aren’t the same thing at all.
Why would I want to pretend to be one of them?
There’s no pretense involved. You tell them, “I’m becoming a Catholic. I can’t receive communion with you any longer, and I will not participate in anything that contradicts my newfound faith, but I care about you as a community and I am happy to fellowship with you, study the Bible with you, and worship God with you as long as you are willing to put up with me.”
The Holy Father is saying that it is OK to keep what is good from the Baptist, even though you’re a Catholic and it’s also necessary to maintain your fraternal relationships, because we are brothers and sisters. Continue to love the people and everything they gave you. He’s not saying, “Become a Catholic and pretend to be a Baptist by going to Baptist service every Sunday.”
I agree that he’s not saying to go to a Baptist service every Sunday. He says nothing about that one way or the other. I am saying that if he really meant what he said, then it’s hard to see how it could be
wrong to express that truth by continuing to attend a Baptist (or some other non-Catholic) worship service on a regular basis. To say that it would be wrong is to make a mockery of the Holy Father’s words. Christian truth is always embodied. If you don’t reject your heritage, then you must be able to go on practicing it insofar as it doesn’t contradict Catholicism. Otherwise the Pope was engaging in empty politeness–not something I have found characteristic of him.
I am passionate about this because this is the issue that I face as well–with the difference that the congregation in question is Episcopalian rather than Baptist, and the “girl my own age” is my wife

.
Edwin