The real authority here is the fact that what was done to the
prisoners accords so well with the most degrading and shameful things
that could possible have been done. In other words, it's too perfect
to be a coincidence. They wanted to break these men, and what was
worse, do so in a way that would prevent them ever being able to hold
their heads up in their own society ever again.

Tell me, in what culture is being walked around naked on a leash
considered a sign of honor?

That's abtuse. You know as well as I do that in certain cultures being
shamed and degraded in certain ways, even against your will, makes you
ineligible to re-enter that society. And what worse torture is there
than being excluded from your own culture, or being shunned within it,
for something others did to you?