Say this to Tulkas or even Orome.
Tulkas enjoys fighting, not slaughter. Orome enjoys hunting, not slaughter.
Wrath is never good in a human.
Basis for this statement? Wrath can be misdirected, but it is possible to have a righteous wrath, too. Even within Tolkien's works, there appear to be numerous times when a mortal's wrath appears to be portrayed positively.
"He came alone, and in bear’s shape; and he seemed to have grown almost to giant-size in his wrath." (Beorn in
The Hobbit)
"Swiftly he returned and his wrath was redoubled, so that nothing could withstand him, and no weapon seemed to bite upon him. He scattered the bodyguard, and pulled down Bolg himself and crushed him." (Beorn in
The Hobbit)
"Suddenly, and to his own surprise, Frodo felt a hot wrath blaze up in his heart. ‘The Shire!’ he cried, and springing beside Boromir, he stooped, and stabbed with Sting at the hideous foot." (
The Fellowship of the Ring)
"Aragorn smote to the ground the captain that stood in his path, and the rest fled in terror of his wrath." (
The Fellowship of the Ring)
"There was some murmuring, but also some grins on the faces of the men looking on: the sight of their Captain sitting on the ground and eye to eye with a young hobbit, legs well apart, bristling with wrath, was one beyond their experience." (Sam in
The Two Towers)
"And they fled before the wrath of Isildur, and did not dare to go forth to war on Sauron’s part; and they hid themselves in secret places in the mountains and had no dealings with other men, but slowly dwindled in the barren hills." (
The Return of the King)
"For morning came, morning and a wind from the sea; and darkness was removed, and the hosts of Mordor wailed, and terror took them, and they fled, and died, and the hoofs of wrath rode over them." (
The Return of the King)
"The great wrath of his onset had utterly overthrown the front of his enemies, and great wedges of his Riders had passed clear through the ranks of the Southrons, discomfiting their horsemen and riding their footmen to ruin." (Eomer and his forces in
The Return of the King)
"Few ever came eastward to Morgul or Mordor; and to the land of the Haradrim came only a tale from far off: a rumour of the wrath and terror of Gondor." (
The Return of the King)
"These three were unscathed, for such was their fortune and the skill and might of their arms, and few indeed had dared to abide them or look on their faces in the hour of their wrath." (Aragorn, Eomer, and Imrahil in
The Return of the King)