You are correct. Even US government officials who claimed as much have been unable to show us evidence. But they swear they have irrefutable proofs.Regardles of all silly obfuscating anti-Russian posts , no one has produced a shred of credible evidence to support the myth that Ukraine seperatist , or Russia were responsible for downing MH17.....evidence still points towards the Ukraine government with outside help. The trolls have now moved in to try and cloud the truth , as usual.
The state department spoke person even mentioned that the proofs are all over the social media; she means Twitter and Fcebook.
I don't think they are very credible at all. But it's all part of an anti-Russia vilification campaign. It's complete propaganda to stir up emptions and raise public opinion against Russia.
The US are going back to their paranoid "commie-bashing" tactics.
That shows you that the States are going backwards.
That and the NSA scandal sum up America 2014.