All three of John Fetterman's top communications staffers have resigned in the last month

[stopdiggin]

2. people disagreeing with each other on policy is not the end of the world

And people have a right to work with and for things that align with their viewpoints.
On the other hand - purity tests are a huge detriment to any kind of cohesion within party - and translates into ineffectual movement and diminished gains for all. And Sen Fetterman is clearly the person that won the seat - and appears to be quite capable of forming his own opinion - and definitions of allegiance.