Where to start?? Where to start??
First, I never went to Bible College. I went to seminary for 7 years where I got straight As and top student in Greek. I also went to a theological institute and studied theology for a few years till my RA hit my hand, and I couldn't type. Then Long COVID finished me off. I took second year Greek online from Bill Mounce, one of the top Greek scholars in the world, whose father was also a Greek scholar, and started teaching him Greek at age 3. He spoke classical Greek, and modern Greek and would often share interesting things about the changes in Greek over thousands of years, or things that stayed the same. He told every student to learn modern Greek, and his text books were full of modern Greek. I did work on modern Greek for a while, but ended up going back to Ukrainian, which was the language of my grandparents. But I can often read Greek on a map, based on Koine Greek. Plus, I am in a group on FB that examines the original languages, with many professors, and they always tell people to learn modern Greek. I don't know where you got your info, you probably have never met a Greek scholar, and are just quoting one of your KJV Only websites. Dr Mounce said everyone he worked with on translation committees all knew modern Greek, plus they talked to each other in it. So, more false info!
As far as modern manuscripts being supervised by the Catholic Church, Erasmus was a Catholic priest. That is the basis of the KJV text. Better look into that!
Another error you have made, is I came to my conclusions about the Byzantine text by looking at and reading numerous examples of the texts. And all the copyist errors, including a one letter difference, which makes it a different word. How dare you tell me I read only scholars? Besides which, not all scholars say the same things. If I am digging deep into a topic I will read up to 50 sources on the issue. Then I go back to the Bible, to decide my preference in the matter. Always being open to consider new information as new manuscripts are found. For example, Daniel Wallace, the author of the top second year Greek grammar got permission from the Greek gov't and Orthodox churches to photograph every single manuscript in their churches & libraries, in Greece and Istanbul. He was discovering amazing things. It will be interesting to read some of his conclusions regarding the material, But then, you've never met an actual Greek scholar or looked at manuscripts, especially over generations of copying, to see how the mistakes and the margin notes get copied into the next generation of manuscripts. And yes, I have seen it with my own eyes. But I also trust my Greek professors. Bill Mounce was phenomenal. A master teacher. He never presumed upon his knowledge but put so much preparation into each lesson. And such a depth of knowledge. But so humble, without knowing it. He told us a story about a brilliant Bible scholar and teacher, and wondered how he could even consider himself a scholar compared to this man.
You obviously have never stepped into any post -secondary institute to have such an ignorant understanding of scholarship, and the time, effort and intelligence and hard work and dedication it takes to earn those "fancy" degrees. Real degrees take constant and dedicated work. Many of my fellow students were pastors, seeking to learn more about God. One young man was a missionary, living in a jungle in southern Mexico, and having to drive to a town for the online classes. He also had 4 children, and was brillant. He also almost died of COVID, and God touched him and he was instantly healed! A Southern Baptist.
You have an anti-education attitude. You put down anyone who knows more than you, because of the huge effort they made to study themselves approved. That is from the KJV! Funny how so many put down higher education for Christians, when there are so many excellent conservative seminaries & theological schools. Everyone I knew felt called by God to go to seminary including me. I disobeyed God, cause it wouldn't give me any increments for teaching in public school, and I thought women couldn't be preachers. Not that I wanted to be a preacher. Then I got really sick. When I finally found good meds my, God called me again. I never waivered, and when the going got rough, that call remained in my heart.
There are many reasons the Jonannine Comma should not be there. Including that the earliest manuscripts don't have it. The only reason it is in the KJV, is that the Catholic Church demanded Erasmus leave it in for theology's sake, even though he could find no evidence of its existence. But he left it in to get the Imprimateur's stamp of approval, and the KJV used his translation as the basis of their work. You know, the Roman Catholic priest. As far as witnessing about the Trinity, to whom would that be done? Unsaved people need to hear the gospel. Yes there are some Christian cults that don't believe in the a Trinity. We have a friend who was United Pentecostal. Oneness, no Trinity. He even reads only the KJV. Having that verse there has done not a thing to convince him of the Trinity. I've argued other verses with him, but "God told me!" God tells him all kinds of things that are in conflict with his KJV Bible, but he is stubborn and his theology is stuck. I'd much rather use other texts to argue the Trinity, cause almost everyone knows 1 John 5:7 is spurious. Better to show the Trinity in other places!
And yes, there are definitively liberal, progressive scholars who attack the Bible & doctrine. I've personally never met any of them, my seminary was very conservative. We had people from many denominations attend, even charismatics. The seminary even let them take an extra theology course from their own denomination. Like a Lutheran student studied with a former Lutheran professor. Two Mennonite students studied with a Mennonite scholar. Plus we had many different Baptist Conferences in our seminary. One, because his Baptist denomination had become so liberal, he left it and wouldn't go to their seminary, which was a few blocks from his home, but travelled across the province to get a quality conservative education at our seminary. The seminary had an excellent reputation!
So, just because there are bad professors in seminaries that have gone astray, doesn't mean they all have. Instead of listing the negative, look into how many conservative scholars there are, from a variety of denominations, and independent ones. My theological institute was not affiliated with any denominations, and we all got along so well, and I learned so much from excellent professors who believed every word of the Bible.
Anyway, you definitely suffer from hearsay and a lot of lies that have been fed to you. You've never met a conservative scholar or been to a conservative seminary. That's ok, you're not an academic! But stop criticizing things you don't know anything about. You accuse me of learning from professors, and I freely admit I have. Then turn around and spout internet garbage, without even quoting the source. Maybe next time, I'll put some of your internet stuff into a Google search, to find where all this KJV Only nonsense comes from. Read the KJV if you want, but don't tell others it is the best and true Bible, because it isn't!