Is Grendel A Monster?

Is Grendel a monster? In Beowulf's eyes, yes of course. Grendel terrorized a town and killed people, therefore he deserves to die. Now, in Grendel's eyes, he feels like a social outcast. He isn't allowed to be apart of the festivities and drink mead with the others, therefore he feels alone. He can't stand listening to them party in the hall and not be allowed to be apart of it. Is it Grendel's fault that he looks the way he does? It's not, and clearly he is human in some way. Whether it be his actions in the film where he shows mercy towards Hrothgar's wife, or his sadness when he's dying basically in his mother arms. He doesn't want to be the way he is and Beowulf makes him up to be so much more, but that doesn't mean Beowulf is wrong.  Beowulf was sent to kill and rid "the monster" and his intentions were solely that so he had no time to recognize Grendel for being more than just a monster. Yet, Grendel still killed innocent people having a good time because of his insecurities which is wrong, but I don't think Grendel truly knows it's wrong and naturally his mother condones this behavior so she's the true monster, not Grendel.