There must be some communication error on my part here. The spy's for the Sanhedrin left after the miracle to report back about Christ. Those who came to Christ and those who stayed with Christ were chosen among men. I'm not sure of what offense you are accusing me of.
I'll explain it. When Jesus said that you had to chew his flesh and gulp his blood or you were not with him and would not have a part of the Kingdom, he was referring forward to the institution of communion - eating the blood and body of Christ - at the Last Supper.
He was not talking about reading Scripture. He was talking about the wine and the bread, and how they will literally be the body and blood of himself. Taking communion is fundamental to salvation. IT, not reading the Bible, is what is vital to be part of Christ.
What you wrote appeared to the Catholic reader as substituting the flesh and blood of the eucharist - and absolutely central and necessary nature of taking communion, and replacing it with something about reading the Bible and understanding doctrines.
That offended the Catholic reader.
You did not intend to do that - you sincerely believe that the BIBLE is the centerpiece of God's revelation. Catholics believe that we EAT GOD every Sunday, and that by doing so, we PHYSICALLY TOUCH GOD and our venial sins are wiped away, by God, by doing so, just as sins are literally washed away, by water, at Baptism.
The core of individual Catholic practice is wiping away sin - with water, with confession and penance, and with holy communion. Protestants have replaced all of that with reading a book, the translations of the Bible, and thinking about them.
The differences in practices are so stark that there is great misunderstanding.
Also, Catholics are severely criticized, hectored, by Protestants whenever you are in a place where religion and differences are seriously discussed, as this forum. Protestants believe that the Bible is central and the sacraments are merely traditions of men. Catholics believe that we are literally eating God, and that God is literally washing away sin, and that THIS is central to the religion, while reading the Bible - while a good thing - is essentially unnecessary.
Because Protestants and Catholics have screamed at each other for 500 years about these things, and killed each other by the millions over them, there is tremendous misunderstanding, and there is the expectation that, once a discussion happens, it will quickly devolve into the shoving match that you see on this particular thread, and every thread. These are two different fundamentally different religions both claiming to be the same.
So, when you posted, innocently, a positive story about a passage that the Catholic poster had mentioned, and you explained how that very passage had come up in a discussion with your daughter over the weekend, you were - inadvertently - walking into the middle of a firefight, and then presenting a reading of that text which is violently repulsive to Catholics.
In that text, Jesus said that you have to take communion to be saved. That's what he said - you have to literally eat his flesh and blood, which can only be done at communion. That's what the text says, and that is what it literally means - according to the Catholics. So your stepping in, at that moment, and writing a well-meant story about how you explained to your Protestant daughter your Protestant belief that Jesus was talking about Scripture and the Bible (he was not: he was saying that taking communion is necessary for salvation) - this was taken as a direct assault and challenge on a central doctrine of Catholicism, by a new arrival on the scene.
It's unfortunate, because you did not intend that, and the ferocity of the response left you understandably bewildered.
Anyway, that's what happened. And the Catholic who said what he said to you did not mean to personally attack you. He launched a counterattack on what he perceived (mistakenly I think) to have been an intentional frontal assault on the very heart of sacramental Catholicism.
Catholics and Protestants have a very hard time understanding each other. And given the long and fraught history of animosity, particularly in the English-speaking world, often expect the worst from each other.
In this particular case, I don't think you intended to start a fight - one was already going on, and you just happened into it.