People weren't equal before the law prior to this, so I'd love to hear of a better solution, EnglishEdward.
The fact that the principle of people being equal before the law may be incompletely applied in law
and often not applied in practice does not mean that the princple does not exist and ought not to apply.
Things are different in federations and settler colonies
Yes, we have noticed EU officials having exemption from member state law, members of UA armed forces
benefiting from treaties exempting them from local law, and settlers ignored the rights of indigenous populations.
A point I wonder is did they claim that Creek law should apply on being arrested or at their first trial.
If not, it seems a rum situation in Oklahoma. Accused people there may have understood
that state law applied and accepted it hoping for an acquital or failing that a light
sentence, but when they fail to get acquited and get a heavy (even a death) sentence,
one particular subset of the convicted get a second chance based purely on
hereditary e.g. racial gounds, to have their conviction conveniently overturned.
I do not know what will happen there, but if significant numbers of people
found guilty by juries and sentenced for serious crimes are able to use this
ruling to walk free, consequent problems may result in SCOTUS rueing its decision.
Does SCOTUS similarly recognise that Australian law applies to
Australians doing things in Australia?