How Brutal Achilles is?

 Who is This brave Man? hm. oh Achilles. he is an Achean warrior and a DemiGod; A Half human and A Half God. Achilles is the son of Thethis and Peleus. Achilles also has a cousin named Patroclus, they were very close to each other, but Hector (Strongest warrior among the Trojans) and Apollo (God and a Guardian of Hector) killed Patroclus, and that started a fight between Hector and Achilles, but Achilles is stronger than Hector. That's why Hector's Father discouraged him not to fight with AChilles. Because King Priam believed that, If Hector will fight Achilles, Hector will be killed by Achilles. King Priam said that:

                “HECTOR. MY DEAR SON, DON’T STAND OUT THERE ALONE,

                FACING THE MAN WHO NO ONE ELSE TO HELP YOU,

                OR YOU WILL QUICKLY MEET YOUR DEATH, SLAUGHTERED

                PELEUS’ SON, WHO’S MUCH MORE POWERFUL.

                DON’T BE OBSTINATE. IF ONLY THE GODS

                WOULD LOVE ACHILLES JUST AS MUCH AS I DO.

                THEN DOGS AND VULTURES WOULD SOON GNAW AT HIM

                AS HE LAY THERE. AND THEN MY HEART MIGHT BE SHED

                ITS DREADFUK SORROW, FOR HE’S TAKEN FROM ME

                MANY VALIANT SONS. SOME HE’S BUTCHERED.

                OTHERS HE’S SOLD IN ISLANDS FAR AWAY. “(BOOK 22.50-60.220-221)

And that shows how brutal Achilles is.  He doesn’t choose anyone and he treat everyone like an animal even his soldiers.