It all began with the Bible?<quoted text>
Start with the Eucharist. He undid what Jesus Christ started and all his Apostles taught.
Your husband also added a concept called Sola Scripture that Christ never taught.
From tat false teaching, he determined that Mary had other children (brothers and sisters?). That Peter was never the head of the Apostles and did not have any successors. He determined that the Beast is the Roman Catholic Church. He teaches that Catholics worship statues and Mary. He made up a scenario that everyone has the authority to interpret scripture and dictate what Our Lords ministry is.
This all began on a lie called Sola Scripture.
The changing of the Eucharist is the most dangerous.
Yep! Dangerous indeed if you are on the opposite side of the Bible.