are dual citizens also able to leave?
My understanding is that even a solely Israeli citizen with a permanent home abroad can leave without issues. Foreign passport is more about proving that than anything else.
I'm hearing reports that foreign citizens are getting out very easily, since it's illegal to hold them here. I believe Chaim vechesed can help if needed.
It's not any more illegal than holding Israelis, but as reported in the airport thread and DDMS, foreigners can leave without special permission.