Are Isis different from the taliban? yes:

‘What’s very interesting about ISIS is that they seem to reject the international order altogether, and I think that’s very unique and different. Even when the Taliban were in power, they sought international approval to an extent. I don’t think ISIS is necessarily more bloodthirsty than the Assad regime, or the Taliban, or al Qaeda, but what’s different about ISIS is that they are very happy to show their atrocities. They post it on Twitter. They put it on YouTube. And it’s because they have basically rejected the international order, and they’re rejecting working with the international order, and claiming their own order, an Islamic order harking back to the caliphate days, and because of that it seems like they’re much more bloodthirsty than any other group. ’

http://www.vice.com/read/we-spoke-to-a-veteran-war-correspondent-about-the-origins-of-isis-822

and this is something no one should forget: ’As monstrous as the Islamic State may be, its success is fueled by legitimate grievances on the part of a Sunni population that has been relegated to second-class status by the Maliki government, a government that came into power as a result of the United States’ recklessly short-sighted invasion and occupation of the country’

’It’s not like a foreign power, a major power like the US can come in there and somehow defeat ISIS without causing unintended consequences or second- and third-order effects of the sort that gave rise to ISIS in the first place.’

Why is all this hapening??? 

'What we’re seeing, more broadly speaking, is the fact that we’ve had 30, 40, 50 years of dictatorship, secular dictatorship across the Arab world, in which you’ve had very weak left forces that can articulate a vision of social justice that’s also secular. Those forces have been extraordinarily weak, in large part because of these dictatorships, because of Arab nationalism and Baathism and a lot of these ideologies that garb themselves in left-wing rhetoric but actually, in practice, are very oppressive. And so I think that robs a lot of genuine social justice and left-wing political movements of their legitimacy. And instead what you have is left-wing dictatorships or Islamism as the alternative.

And so after the Arab Spring, the secular dictatorships have been overthrown for the most part, or they’ve been attempted to be overthrown, and there’s nobody else to fill that vacuum except for the Islamists, and so that’s what’s playing out across the Arab world.’

The failure of secular dictatorships. repression, etc, … secular dictatorships are overthrown, and an ideology people turn to is religious dictatorship

Is the middle east fucked for the near future? probably:

'I don’t think there’s an easy solution to that. It’s a generational thing. It’s going to take rebuilding, rediscovering these forms of politics and resistance that don’t have to do with Islamism and don’t have to do with Baathism and these other ruinous ideologies. It’s going to take a lot of time, and unfortunately, it’s going to be very bloody.’