Fearing the Warmonger POTUS?

I don't understand the joy of those supporting the Iran nuclear deal on the justification that lack of this  deal means war with Iran.

President Clinton bombed Iraq for four days in 1998 to destroy WMD targets. No general war followed.

More important, do these people forget that Barack Obama is our president? They really think he would go to war absent a deal?

So how is war the only alternative to this deal?