It makes sense that a lot of well-connected former DOJ and FBI employees want Barr gone.
Consider that no charges will be brought against Andrew McCabe, who committed crimes far more serious than anything alleged against Roger Stone—McCabe was referred for criminal prosecution by the Inspector General in at least one report. His case is dismissed by the DOJ. Roger Stone, on the other hand, is facing nine years for a process crime of supposedly lying to congress which may in itself be in dispute, since the entire case he supposedly lied in is completely debunked.
Barr is getting at this miscarriage of justice in our two-tiered justice system. A few of the Comeys and McCabes WILL be prosecuted and face jail time. It makes sense that this cabal and its followers want him out.
There is no indication, however, that this isn’t anything new in the hate=Trump hysteria