I am assuming you have spoken with Dr Hulda Clark and know that she was not aware that MH was to show others her letter. Or, in the absense of real proof have you have choosen to fearmonger?
While I agree that it would be a violation of someones trust to show a letter to a stranger like that, I do not know that MH didnt have permission to do so. If I were you I would have asked jcounts or MH or Dr Hulda Clark if MH did have permission first before posting something that is potentially libelous.