What is the basis for your statement that Nagell created the Card??
You said he had the card. Therefore if he had the card then he either made it himself or was aware someone else made it and he was happy to have it in his possession. If Nagell had the card, then he is in effect endorsing it. And as the card is fake, then that makes Nagell a fraud.
It would take someone weird to fake that card and Nagell was doing lots of weird things.