Who do Scientologist's blame?

The tragedy involving John Travolta’s son and the incredible loss to their family started this question. I know as Christians, that in incredible times of pain and struggle, some of us blame God in our anger and frustration.

Who do Scientologists blame?

This isn’t an indictment against Scientology. It is just a question about different faiths. I would like to know where they place their frustration. L. Ron Hubbard could be the answer but could it also be their energy? their clarity?

Any Scientologists out there with a perspective on this. I really am interested in knowing how other religions handle grief and blame.