Why do many Protestants reject 2 Maccabees as a basis for belief in purgatory?

Protestants generally reject the use of 2 Maccabees as a basis for the doctrine of purgatory because they do not consider the book to be part of the canonical Scripture.12

During the Reformation, Protestant reformers insisted on the principle of sola scriptura, or Scripture alone, as the sole authority for Christian teaching. They maintained that the Old Testament canon should consist only of the books found in the [Hebrew Bible]. Consequently, they classified 2 Maccabees and other deuterocanonical works as Apocrypha—writings that might be edifying to read but lacked the authority to establish doctrine.3412

Because 2 Maccabees 12:41–46 describes Judas Maccabeus offering prayers and a sin offering for fallen soldiers, it has historically been a key text for Roman Catholic support of prayer for the dead and the existence of an interim state. Protestants, however, refused to accept these passages as authoritative support for such practices, viewing them as human inventions rather than divine revelation.5623