No, Horde (under Nu-Blizz) def fits Sentry to a T.
This has always bothered me to some degree. Thrall has been othered so hard, not only by Nu-Blizzard’s reading of Old-Blizzard’s lore, but by the playerbase. Anyone who has learned from humans cannot be Horde, which is the most ridiculous gatekeeping I’ve never heard of. People act like Thrall wanting peace makes him similar to Baine, who cuts off of a piece of his male sex characteristic --his horn – to mail to Anduin. The two are wildly different, but people see Thrall’s amenable in nature and conflate it with Anduin’s pet Baine. It’s infuriating.