First, you've obviously read more details about this case than I have. That said, if Spencer is the only case and hasn't infected anyone else (despite what you consider poor choices), that strengthens the case that this is hard, hard, hard to transmit.

What's your opinion of a physician who knowingly treats Ebola patients (in an Ebola-stricken area) as recently as Oct 12, comes home, and not only does not self-quarantine, but also takes public transportation (something the CDC has advised against), goes to a restaurant, goes bowling, etc?

I'm not going to challenge anyone's opinion. Everybody can have their own assessment. My personal view is that the doctor was arrogant - an attempt to flaunt to the world the (very low) transmission factor of the virus. That's what concerns me - I don't fear an epidemic, I fear that arrogance is going to lead to problems.