I can't reply the other one but you truly are grasping for straws, in your exemple you coud get convicted in the origin country if buying was illegal, for importing and for owing/using it in the destination country if those were offences. That's exactly what is going on here, there's no middle man providing the telegram service for people in Germany so if hosting/providing that service is illegal (because telegram allows pro-nazi stuff or whatever) who else but telegram will be held responsible? They are the ones operating in Germany providing the chat/group message thing, if there were a middleman (like it happens with games in some cases) the court would be talking to them, just like happens (traditionally) with importers.
If Telegram is illegal to use in Germany and it has no presence in Germany, its users in Germany are the ones breaking the law. To act as if Telegram faces criminal liability for simply not blocking Germany is as asinine as acting as if an exporter faces criminal liability in the destination country when they have zero presence there.
