After browsing the threads about Mt.Gox and the malleability issue here are a couple of questions.

Q1. Is there any way to ascertain that the Mt.Gox bankrupcy was indeed induced by transaction malleability?

I understand that the malleability issue is real. Indeed it has been real and known for more than two years. I still fail to understand how it could be realistically harnessed to heist hundreds  of thousands of bitcoins.

Q2. Are we sure that the whole thing wasn't orchestrated with the complicity of Mt.Gox management? Can we ever be sure?

Q3. Consider a Bitcoin maketplace model where major exchanges  mysteriously go bankrupt and handwave their alleged losses to some technical issue, previously regarded as minor.  Is such a model viable in the long tem?