Thomas is right.
This case isn't as much about marijuana as it is about the intrusion of the High Court into state laws.
No matter what one thinks of marijuana all of us should be concerned when judges meddle in state laws with no backing from the Constitution.
The Commerce Clause if left to the interpretation of the SC can well become a means to regulate every product of daily life since every product is "only an instant away from an interstate market".
The Constitution tells government what it cannot do. It was never meant for government to tell us what we cannot do.
The reaction here on FR to this ruling makes me think that when it comes down to it, we originalists really don't have any support in opposing judicial activism.