The case of the extradiction of the Spanish politician Carles Puigedemont made me wonder whether the justification of the partial non-execution of the European Arrest Warrant (EAW), decided by the Oberlandesgericht Schleswig-Holstein, is justified.
The EAW names several grounds for optional non-execution. However, in the case named above the Court of Schleswig-Holstein justifies its decision by saying that the level of violence applied by the person subject to the EAW was not strong enough to be considered as "High Treason", referring to German jurisdiction. However, the only ground for non-execution that references the jurisdiction of the executing member state is found in Point (3) of Article 4 EAW, which doesn't seem to be applicable in this case.
Is the justification of the German court based on another principle that is not stated in the EAW, requiring to take into account the case law of the executing member state? Or could it be justified via another one of the seven paragraphs of Article 4 EAW?