I disagree with the decision as I also see it as double jeopardy but I see where they’re coming from.
The federal government acts independently of the states, having separate court systems, laws and processes. Even if the crime is the same incident, the laws being broken are two separate laws.
Frankly this could be fixed in congress easily - but don’t hold your breath.
BARRETT, J., delivered the opinion of the Court, in which ROBERTS,
C. J., and THOMAS, BREYER, ALITO, and KAVANAUGH, JJ., joined. GOR-
SUCH, J., filed a dissenting opinion, in which SOTOMAYOR and KAGAN, JJ.,
joined as to Parts I and III. https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.supremecourt.gov/opinions/21pdf/20-7622_ljgm.pdf&ved=2ahUKEwizvdex-8H4AhXEATQIHUNCBPsQFnoECAUQAQ&usg=AOvVaw0UKjaiVvewU2yBkKbsDms9