I understand this, and I agree it is a double disgrace. But two wrongs, etc.
To be very clear, I have no sympathy whatsoever with Nazis. And I don’t think crimes against humanity can ever fall under the statute of limitation.
I still think that with the ICC, a clean, legal solution could be found. I think most other action would lead to creating another so-called “martyr” of the right.
Just FTR, I’m not against a deportation to Germany, but considering his legal status I doubt it would be possible for the German state to a) issue a passport and b) sent him to trial without said passport. The willingness to send people to court because of funktioneller Beihilfe is generally given, I think. But it would be difficult to find a legal construction to allow a verdict over someone who seems to be a US citizen, legally, and nothing else. 
CC @TobinL
