Why did snape and dumbledore plan dumbledores death?
They didn't; it was Dumbledore's plan. Snape agreed to go along.As for the reasons:Dumbledore was going to die soon, anyway. Snape had estimated that the curse would kill Dumbledore in about a year.It was important for Voldemort to trust Snape.They didn't; it was Dumbledore's plan. Snape agreed to go along. As for the reasons:Dumbledore was going to die soon, anyway. Snape had estimated that the curse would kill Dumbledore in about a year.It was important for Voldemort to trust Snape.They didn't; it was Dumbledore's plan. Snape agreed to go along. As for the reasons:Dumbledore was going to die soon, anyway. Snape had estimated that the curse would kill Dumbledore in about a year.It was important for Voldemort to trust Snape.They didn't; it was Dumbledore's plan. Snape agreed to go along. As for the reasons:Dumbledore was going to die soon, anyway. Snape had estimated that the curse would kill Dumbledore in about a year.It was important for Voldemort to trust Snape.