Some of those cruel men inhabit Dol Haedir -- a landmark Turbine created in northern Evendim, and the subject of the newest official Lorebook entry. According to the entry, the men of Dol Haedir are savage cannibals called the Gauredain.
One of the cool things about Turbine's aspirations of authenticity is its careful use of Tolkien's languages even for newly invented peoples and places. The Sindarin "Gauredain" translates roughly to "Werewolf Men." These guys certainly look the part ... and act it too, what with the eating human flesh and all.