You would think they would support the buses, from the standpoint of getting more cars off the road. I live close by one of the Microsoft Connector bus lots (the parking lot of a local church). I can reliably state that that particular lot is getting 60-70 cars off the road going from central Snohomish County to Redmond.
The thing about progressives is that they are a crazy mishmash of competing identity groups. When one of their core ideals conflicts with one of these identity groups, the ideals are tossed to the side of the road. They're all about principals, not principles.
Incidentally, this is also why they tend to eat their own, as it's not uncommon for two or more of these identity groups to become opposed...