It's classic politics it's the best way to get elected is to go against the person before you. She's going to take aim at things Obama was/will be criticized for to get herself some of the chunk of the middle who's leaning away from the D ticket.
Hillary never liked Obama. Bill said worse about Obama.
It's not a viable thing, it would just create another Al Qaeda. The idea that overthrowing secular tyrants and replacing them with moderate muslims has proven to not work several times. I mean this song and dance has been played many many times.
Why would they? He took her job.