A healthy dose of skepticism strikes me as in order here, but there is far too much cynicism on display. Yes, my BS alarm goes off when it is claimed that the reason for Comey's firing is that he was unfair to Clinton. Is it possible? Yeah, I think Comey got too far out on a weak branch when he tried to satisfy both sides with his "Hillary was reckless but not negligent," formulation on the email server prosecution.
But to jump from that to "this is all about the Russia investigation," is not skepticism, but cynicism. The Russia investigation is going nowhere, for the simple reason that it's a ridiculous attempt at a Hail Mary after time has expired. Functionally it's nothing more than 9-11 Truth or Obama Birtherism was: a desperate attempt to deny the otherwise obvious legitimacy of the current president.