I think I agree with Jackson Diehl in his good article "Egypt's Misguided Coup":
Applauders of military coups have in common two illusions: that the generals share their agenda and that their hated opponents, despite their electoral victories, can be politically nullified. Invariably, neither turns out to be true. Armed forces aren’t good at convening roundtables or implementing liberal platforms; they are good at using force. Even if they don’t torture and kill, they sweep up nonviolent political leaders, shut down media they regard as troublesome and try to impose political rules protecting their own political and economic interests.