I learnt couple of days ago that some Sanders supporters are angry at Joy Reid's tweets after the recent shooting of a US Congressman. She tweeted that Sanders did vote for some NRA supported bills. And we should be able to talk about such issues. She also criticized his emphasis on going after Independents — which to many reasonable people is a legitimate criticism.
That was sufficient for these supporters to start a petition to get her fired. Considering her body of work on various liberal issues, all these supporters care about is that Sanders has been criticized and so that person has to go. This my way or highway approach of some Sanders supporters is dangerous to the health of the Democratic Party.