You're making claims that the bible says that no Catholics, no Orthodox, no Methodists, no Lutherans are true Christians. The bible doesn't say that; you claim the bible says that.
You can't know know what the texts mean unless you interpret, for meaning comes out of interpretation. When you read the texts in anything but Hebrew and Koine Greek, you're interpreting.
No they don't. If they did, there would be no English versions, nor would there be an LXX.
It is if you can't back it up with exegetical reasoning.
Apparently, you're not here to do your own work, either.
If you can produce one biblical passage that actually says, "No Catholic, no Orthodox, no Methodist, no Lutheran is a true Christian," I'll publicly say that I was wrong; you were right, and you're more biblically literate than I -- no strings attached. And I'll leave you alone. Until you can do that, you're making a baseless claim -- I'm right and you're wrong.