"The group "seems to have been in existence for just a few months"
You mean, roughly coinciding with HRC's failure to mobilize her base, and dawning recognition that she wasn't simply going to ascend the throne as planned?
Rather than invent a giant Russian hacking cabal, it's simpler to recognize:
- fake bullshittery news has been with us on the internet since...the internet. Election seasons in particular have always been rife with "did you hear" watercooler talk.
- its far easier to blame "them" on the internet than to accept that "Liberalism Ascendant" wasn't perhaps as inevitable as some thought, and a really shitty candidate CAN still lose an "in-the-bag" election
- not every story that HRC (note that all the 'false news' stories are one-sided; apparently nobody spread false tales about Trump? Really?) claims was fake was, ipso facto, fake. We seem to have quickly and conveniently moved on, for example, from what was obviously some serious seizure issues that have been hand-waved away as "fake news"