OK, you got me. What's a crypto-protestant?
The protestants are loath to admit that the Roman Church gave us the canon of Scripture ...
It's based on a preference for truth.
Not trying to be funny, but I recognize that there is a certain level of orthodoxy maintained by Lutherans and Anglicans and other groups that emerged from the reformation. The groups that emerged from the original generation of protestants seem to be indulging in a lot of latitude with their theology and to merely categorize Seventh Day Adventists and Mormons and Unitarian Universalists as protestant seemed to lack nuance.
The protestants are loath to admit that the Roman Church gave us the canon of Scripture ...
It's based on a preference for truth.
Ignorance of history is not a preference for truth.