I sincerely, don´t understand the final purpose of the terrorists.
Here is a little summary; Since last March, there was a cease of fire, empowered by the aim of the goverment of stablishing a way of negotiation in order to reach the end of the terrorist organisation. Lately, everything seemed that the process was "paused" because there are a lot of people who don´t agree with negotiating with terrorists and there is a lot of pressure in the Parliament. And maybe, this morning action by the terrorist wanted to hurry-up the goverment in keep on going ahead with the process, although in my personal opinion this is not the way of solving problems; I mean by planting bombs, but also; and which I think is more important; as democrat, because democracies must not negotiate with terrorists.
Apart from that, there still the casualties (over 1,000 in almost 40 years) and the damage to facilities, like in the airport this very morning.