The Bible alone, Sola Scriptura, is a tenet of Protestantism. All is to be tested by scripture. If a doctrine or belief does not find support in scripture, then it is not an acceptable doctrine or belief. This means that any number of Catholic traditions are unacceptable to Protestants, because these traditions fail when being tested by scripture.
because these traditions fail when being tested by scripture.
>>Correction. They fail when being tested by private interpretations of scripture.