"and I wonder why he seemed to be obsessed with getting Harry expelled, since that would interfere with the objective of protecting Harry so he could eventually destroy Voldie. "
Dumbledore wanted Harry to be willing to lay down his life for the WW, which would be less likely if the boy's memories of wizarding life all revolved around being punished in nasty ways. Making empty threats of expulsion (and I don't think Severus would have believed that Harry would actually be expelled, since as you say this would make it harder to protect him) would have been a good way of making it look like Severus hated Harry without having to make his life in the wizarding world too unpleasant.
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Date: 2012-08-06 05:10 pm (UTC)Dumbledore wanted Harry to be willing to lay down his life for the WW, which would be less likely if the boy's memories of wizarding life all revolved around being punished in nasty ways. Making empty threats of expulsion (and I don't think Severus would have believed that Harry would actually be expelled, since as you say this would make it harder to protect him) would have been a good way of making it look like Severus hated Harry without having to make his life in the wizarding world too unpleasant.