In Peace Talks, Ebenezar is unusually angry - to the point where he might have killed Harry had Harry not fooled him into attacking a body double.
It's not improbable that he's actually much more high tempered than readers perceived.
People assumed that he's sort of a wise wizard type of person from West/MW America, rural Gandalf with a quick temper so to speak, and that his daughter ran away from him because of him pushing her too hard (note that term
too hard here doesn't really say anything since there's no basis on what's the standard norm & what qualifies as hard) and since
her personality is too wild, naturally she chose to fled instead of listening & complying to him. Then also his treatment to Harry in the series so far had been mostly genial & almost like with a child glove's still on, the guilt of keeping familial secret & fallout with his mother was in effect most probably.
But he's
the Enforcer of the highest order in White Council. It's not a job any normal people, wizard or vanilla, would even consider. WoJ is it's something he achieved by going through an enormous amount of fights with so many types of opponents &
survived. That means it requires enormous amount of stubbornness & withstanding enormous amount of stress, as well as living with his extraordinary enemies that people on average don't acquire, which led to higher ceiling of emotional temperament. What he considers as offended, angry, or furious
aren't at the same level as normal people or wizards, and certainly not fantasy book readers.
We just haven't been told how bad it is actually when he's really furious, how he acts when he's in that state in front of Harry as our lens, or how often that can happen. We heard through Harry about impacts of his actions or when he's in battle, but we've only starting to witness his fury when he taking matters as personal wrongdoings in PT.
