The Doves prefer to talk with Iran until Iran actually make a workable nuke of 12. At which point, they will be really sad and mad at the same time. Of course it will be 47's fault.
The Hawks are realistic and know that Iran with workable nukes is an existential problem that can only be solved by eliminating the root cause, however distasteful to earnest Doves.
The Doves will mourn the total destruction of Israel, Rome, NYC and Chicago, but they will proudly say, "We can absorb a hit or two". Obama will cheer them on.
The Hawks will go on to other pressing problems in the world and not look back.