Answer:
Oedipus is intensely angry when he kills his biological father and when he fights with Creon and Teiresias for giving him bad news.
Explanation:
Oedipus has difficulties in controlling his emotions, especially anger. That's because he is a person with an explosive temperament, who can't handle solving intrigues with ease and who expresses himself with violence. This personality trait not only leaves Oedipus a very intense character, but also leaves him a real person who often does not act rationally, being totally controlled by anger, leaving his story totally unpredictable.
Oedipus' anger may be exaggerated for us, but it was a common feature for the Greek society that created this play. That's because the Greeks at that time lived in a very violent time with several invasions and stress. Watching a character unleash his anger in a grandiose way could be somewhat comfortable for the Greeks.
If someone says "I will do it on his behalf" that means "I will do it instead of him" meaning that the speaker will act, rather than the "him" if the poet said "on behalf of us" they probably meant "instead of us"
