1) The verse from Revelation 22:18 refers only to Revelation.
2) Yes, Martin Luther struggled with parts of the Bible. That’s normal. He’s human and no Protestant has ever made him out to be anything more. It’s not like they claim he’s infallible. I’m sure there are many, many Catholic and Orthodox saints who have struggled with parts of the Bible.
But if you read it. For 2 hundred years The Lutherans kept Revelation and other books out. Just making historical point. I left the Catholic church because of the lies that Luther started every where you went in the Independent Churches painted lies and half truths of the Catholic Church.
Every Church has Bad guys thru history. The ones I heard where way overboard. I got to Mass now and Its beautiful and spiritual. The lie that Luther called the Pope the Antichrist was a lie. We declare the Nicene creed and apostles creed(John requirement which defines the proper spirit) at Sunday mass and private devotions. Never did any Indie church say the Nicene Creed. A positive confession. I mean never. Which shows the many reasons the mass is totally biblical.
I meant 1JOHN4 requirement.