This feels very different to many of the recently reported events. It seems like a well planned, well organised (well funded considering the equipment) surgical strike, not a suicide mission.
Also, from the calmness of the gunmen I have seen in the limited footage available, it points to well trained people, possibly military in origin?
I believe it is unlikely these two guys are simply two nutters who decided to go and kill a load of people. I suspect they have had funding and support from other parties.
RIP to those who died. Sad news, and another nail tapped into the coffin of tolerance.