The point was Lupin was actually dangerous, and he himself did not feel safe around children anymore.

‘This time tomorrow, the owls will start arriving from parents – they will not want a werewolf teaching their children, Harry. And after last night, I see their point. I could have bitten any of you ... that must never happen again.’

‘You’re the best Defence Against the Dark Arts teacher we’ve ever had!’ said Harry. ‘Don’t go!’

Hagrid never hurt a student because he was a half giant, Hagrid was just a fairly poor teacher.

Lupin himself decided he could no longer be trusted around students, because he literally turned into a monster on campus, and could have bitten tons of students.

With Lupins own firm rational decision to quit, it was only natural for Dumbledore to accept, even aside from the pressure students, the Hogwarts board, and the ministry would put on Dumbledore's back.

The point was Lupin was actually dangerous, and he himself did not feel safe around children anymore.

‘This time tomorrow, the owls will start arriving from parents – they will not want a werewolf teaching their children, Harry. And after last night, I see their point. I could have bitten any of you ... that must never happen again.’

‘You’re the best Defence Against the Dark Arts teacher we’ve ever had!’ said Harry. ‘Don’t go!’

Hagrid never hurt a student because he was a half giant, Hagrid was just a fairly poor teacher.

Lupin himself decided he could no longer be trusted around students, because he literally turned into a monster on campus, and could have bitten tons of students.

With Lupin's own firm rational decision to quit, it was only natural for Dumbledore to accept, even aside from the pressure students, the Hogwarts board, and the ministry would put on Dumbledore's back.

The point was Lupin was actually dangerous, and he himself did not feel safe around children anymore.

‘This time tomorrow, the owls will start arriving from parents – they will not want a werewolf teaching their children, Harry. And after last night, I see their point. I could have bitten any of you ... that must never happen again.’

‘You’re the best Defence Against the Dark Arts teacher we’ve ever had!’ said Harry. ‘Don’t go!’

Hagrid never hurt a student because he was a half giant, Hagrid was just a fairly poor teacher.

Lupin himself decided he could no longer be trusted around students, because he literally turned into a monster on campus, and could have bitten tons of students.

With Lupins own firm rational decision to quit, it was only natural for Dumbledore to accept, despite the pressure students, the Hogwarts board, and the ministry would put on Dumbledore's back.

The point was Lupin was actually dangerous, and he himself did not feel safe around children anymore.

‘This time tomorrow, the owls will start arriving from parents – they will not want a werewolf teaching their children, Harry. And after last night, I see their point. I could have bitten any of you ... that must never happen again.’

‘You’re the best Defence Against the Dark Arts teacher we’ve ever had!’ said Harry. ‘Don’t go!’

Hagrid never hurt a student because he was a half giant, Hagrid was just a fairly poor teacher.

Lupin himself decided he could no longer be trusted around students, because he literally turned into a monster on campus, and could have bitten tons of students.

With Lupins own firm rational decision to quit, it was only natural for Dumbledore to accept, even aside from the pressure students, the Hogwarts board, and the ministry would put on Dumbledore's back.