If we were calling it a "Demon Hunter" I might agree, but what if we went with the concept of:
As a sample, I chose that example story to intentionally avoid any overlap with the established "Demon Hunter" in the Warcraft universe, even going so far to to say that they get "magic through technology" rather than some kind of "Fel enchanting".(1) A warrior, stranded for a time on Outland, held captive by the Legion until his/her escape, giving him/her a burning hatred for all demons. learned to survive by stealing and reverse engineering Legion technology to make his/her own devices, now he/she passes on this knowledge and fury to a generation of new recruits both Alliance and Horde. he/she doesn't really have any magic of his/her own, but rather relies on the latent fel magic in the devices that he/she creates in the heat of battle.