While in general we should be assisting the world to keep Noahide laws, I suggest we just stay away from this contentious issue: extreme positions on both sides are against halakha and the country does not seem to be inclined for middle ground right now.
Legally, the decision is a welcome support for federalism. If more issues will devolve to the states, we might stop talking about federal – Presidential and Congress – elections.
Practically speaking, this might reverse the famous “Roe effect” leading to more D- voters in 20 years.