Those attitudes - that mental illness are caused by the family - are old and not acceptable any more. See RD Laing for an example of a psychiatrist who used to push this incorrect theory. http://en.wikipedia.org/wiki/R._D._Laing
"Not acceptable"? Your post suggests that, because the "refrigerator mom" idea has been debunked, that mental health professionals can't think that way any more. But this isn't how psychiatry and psychology work. An absence of solid science (of explanations) means that, even though a way of thinking has been discarded at the top, those at the bottom are free to keep thinking the same way.
This is why, more than a year after Asperger Syndrome was abandoned, psychiatrists and psychologists continue to apply the diagnosis. This is why, decades after homosexuality was dropped from the DSM, psychiatrists and psychologists are free to offer therapies meant to correct this "defect" in some of their clients.
> See RD Laing for an example of a psychiatrist who used to push this incorrect theory.
Incorrect or not, it wasn't a theory, defined in science as an idea about a cause, an explanation, with supporting evidence and falsifiable by new evidence. There aren't any of those in psychology.
It's like breaking a stick. The stick can be really thin and easy to break, or really thick and sturdy. But either way, outside pressure has to be applied to break it. The amount of pressure required varies.