They’re not Protestant because they are not Christian, the belief in the Triune God. Therefore, they are no more heirs to the Reformation than they are to Catholicism.
You’ll have to describe your idea of the mindset of protestant. For me it is well demonstrated by the USCCB since the passing of ACA and the HHS mandate: protesting government limitation on free exercise of religious practice.
Jon
Agreed, they are not Christian. And, certainly, they are not heirs to Protestant theology.
Perhaps it is more of a spirit, the idea of reform inherited from the Reformation. I have a book about Lutheranism written by a Lutheran, and it discusses the Reformation, and says it is important to know when the reform is complete. That is, when to stop reforming. That book is right, it is very important, and Lutherans obviously feel that the reform is complete with them. However, and this is the point, others continued the Reformation. Reforming keeps going on, with different groups stopping along the way, but others continuing, demonstrated by the proliferation of denominations.
In Europe, Protestants had the spectre of inherited Catholicism to protest or reform against, but in this Protestant country, what they had was Protestantism itself, to protest or reform against, since that is the Protestant spirit or mindset, to protest and reform. When to stop?
Hence the cults, as Walter Martin called them. They were founded by those who had Protestant upbringings, but decided what they had been taught needed reforming, and so started up new, non-Protestant, and pseudo-Christian religions.