The fact that you comment before going and reading it shows how one sided you are, and all the more so with all the expertise you claim. We know you are a Nino (Scalia) fan. Scalia hates Miranda, we know that. Rehnquist did not.
You really miss the point. He said it was a cert petition. Cert petitions by therir very nature are one-sided. It doesn’t take much expertise to realize that. Far more interesting is the specific legal question at hand. Also, hate is a strong word. Rehnquist respected it as precedent. Do you really think he’d have been in the majority back when Miranda was decided? Scalia often backed rights even when Rehnquist wouldn’t. Apprendi, for example.