I'm sure the Brazilian judge followed Brazilian legal procedures. That's the entire point of being a Brazilian judge. There might be other means to achieve a go

I'm sure the Brazilian judge followed Brazilian legal procedures. That's the entire point of being a Brazilian judge. There might be other means to achieve a goal but that doesn't mean what happened isn't legal. In your example, if that German app was targeted to US users (e.g. by localization and marketing) then yes, they should follow US laws. That's a test German courts use to determine whether they have jurisdiction in the digital world and I think that's fair and should be applied in the other direction as well. If they don't want to or can't (e.g. by contractual obligations or German law) they shouldn't act surprised if the US doesn't allow US business to trade with them.