As a result, terrorist groups, including Islamic State and Hezbollah, could end up "running around the world with nuclear weapons," Eskin said.
The Israeli publicist mentioned former US secretaries of state Henry Kissinger and George Schultz, who recently criticized Barack Obama for reaching an interim deal. "Once you allow them (the Iranians) to advance it's very difficult to stop them. This is their basic thought," Eskin said.
"You can still prevent it now. You can talk to people, who can offer them benefits, you can trade, bargain, even threaten, you can convince, you can make some concessions. … But the moment they start getting closer to the goal, it will be a nightmare for the whole region," according to the political analyst.
A final comprehensive deal is expected to be signed by the end of June.
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