DearDon
It's not their job to do the convincing, they leave that to CNN, MSNBC or FOX. They just give some superficial material to get the ball rolling. There was next to no in depth articulation as to how this was definitely Russia. They're still twiddling their thumbs and saying 'we're confident' it was them.
I've personally come to speculate that there is some dodgy and disgusting acts occurring at this pizza joint. I'm not going to get dogmatic and explain why.
The media, through negligence or design, seems to almost always picks the weakest arguments and presents them as the best there is, if by design it's akin to strawmaning in my book. It works to drum up insane amounts of controversy and/or presents the opposing narratives case as weak. This is why we have 4chan and reddit with these rabid 'citizen journalists' that do all this investigation and forget how stupid it, and they, can be made to sound, it's also why we're going to get more of them, they can navigate through information that allows them to speculate (with good judgment in some cases IMO) that the MSM will just not cover.