Yes, I understand multiple security firms have said "It was Russia, trust us." I don't see much corroboration offered up --- they claim it fits an attack profil

Yes, I understand multiple security firms have said "It was Russia, trust us." I don't see much corroboration offered up --- they claim it fits an attack profile, which I don't find entirely convincing. That's not evidence, it's testimony. I offered my theory on why they might be motivated to state this absent evidence in the previous comment. It is fine if you want to believe their narrative. It was constructed to be believable and at this point it's just an independent judgment call on which sources are credible and which scenario seems more plausible (hacking DNC mail server by a nation-state's cyberwarfare apparatus v. internal whistleblower copying data). No hard feelings.