None believed in a special priesthood, bit instead, they believed in a ministerial class composed of men knowledgeable in the Bible. They rejected Latin as a liturgical language, and used the Vernacular, but trusted their ministers to know the Scriptural language , Greek and Hebrew. Hence the authority of the vernacular Bibles. Today, of course, the Vernacular Bible is accepted as authentic even by those who read not a word of the original languages. No longer is the priest the bridge between God and believer, but the translator and interpreter.
OK, given all of the above, why then are non-catholic Christians considered “united with Christ” by Vatican II?
If the purpose of the Roman catholic church is to protect against error, then anathema of Vatican I should apply to every Lutheran, Presbyterian and yes, Protestants and Evangelicals out there ( Luis Palau included since he was born Roman Catholic ).
But that is not what is indicated in Vatican II.