They are not afraid of Zero and the MB is not afraid of Zero.
The only people who should be afraid of Zero are white, Christian, male supporters of the right to keep and bear arms.
Recall if you will that the uranium processing is said to be done on machines controlled by Siemens provided devices/software. That should be taken to mean that there are large German companies trading with Iran.
If there is large trade, there must be banks to handle the Letter of Credit transactions and the money flow.
The question then becomes are Siemens et al still trading with Iran. Can a US President meaningfully stop the trade of such a large multinationals?