Interestingly, both scriptures (Hebrews and 2 Peter) are among the latest writings of the N.T., reflecting at least a 3rd or 4th generation situation when the "new religion" (I mean Christianity) is getting old enough to register its first defections, partly due to some tiredness because the expected parousia doesn't come. A situation quite similar, mutatis mutandis, to the WT's from the last quarter of the 20th century onwards. Then prominent churchmen, borrowing the names and authority of the 1st-generation apostles, increasingly resort to cursing the "apostates"...
Side memory: this reminds me of one day in May, 1986, when I was waiting for my final JC "appeal" hearing in a Paris KH. I opened my Bible at random to calm my nerves and fell upon Psalm 109. "Food at the proper time", as it seems. I was especially struck by verse 28:
Let them curse, but you will bless.
Let my assailants be put to shame; may your servant be glad.
Hope this may help.