To me, it all seems to boil down to the notion that Bernie would credibly have "drained the swamp," which would have effectively tanked the careers of a lot of long-serving Democratic folks who were not aligned with his populist/progressive agenda. Simply by hiring people that would have aligned with his vision, this was such a threat to existing power, it had to be stopped. Yes, the Rs are worse (in my opinion), but this gives me plenty of distrust for the Ds. Institutions eventually become more about institutional survival than about their "core mission."