Send child to fundamentalist religious school, be surprised when school leaders act like fundamentalists.
Isn't the bulk of the criticism due to the lack of Christian compassion? Love thy neighbour, all sinners, let he without sin, etc.
If it was a secular school that had an equivalent rule or just thought that a pregnant girl would be bad for the brand image, then it would be a dick move. But it wouldn't be so hypocritical.
It says the father hasn't been named. Probably 50/50 on it being one of the teachers.