whos fault is it for all the deaths on the moutain?

I think that there is a lot of blame to be shared. The guides, the climbers, as well as the Nepalese government had a hand in the disaster. Some of the more reckless guides, like Scott Fischer, pushed Sherpa and climbers beyond their capabilities. The pressure on guide organizers to get their clients to summit was emence: their business depended on it. Frequently climbers who lacked both the skill and fitness to make it were indulged to summit despite the risks involved. The Nepalese government green lighted too many foreign climbers because they wanted the very high fees paid by them. This created a backlog of climbers trying to summit during a narrow window of opportunity.