The only thing that seems clear about the authorship of Hebrews, is that the writer seems very familiar with the workings of Judaism.It fascinates me how many people are willing to believe something with virtually no evidence whatsoever and/or treat something as though it were a matter of opinion as if it doesn't even really matter who's right and who's not.
Is this how they do the rest of their doctrine?
Unfortunately, for most, the answer to that question is, yes!
Personal opinions about matters of theology haven't meant anything to me since at least the sixth grade but the average Christian can't tell the difference between a personal opinion and a categorically stated fact and they aren't interested enough to even realize their ignorance, never mind fix it.
I see in the book the passing away of the old testimony, and the bringing in of the new, better testimony.