Given that Ebola is not very contagious--it requires direct contact with infected bodily fluids--flying known patients home in an aircraft equipped for that purpose is not a factor in spreading disease. OTOH, the people who don't know they have Ebola and become symptomatic with vomiting and diarrhea during a long flight might pose an infection risk.
You keep saying it isn't very contagious, but the doctors on the ground (now, some of them in the ground) in Africa describe the disease as "highly contagious".
Feel free to laud the facilities, the aircraft with isolation chambers built in, the transfer protocols to get the patient from the plane to facilities without spreading the virus, but please do not downplay the disease. It is pretty evident from the safeguards and PPE (and level 4 classification) that we aren't dealing with something to play pattycake with.
I am sorry but even the doctors here I talk to think this thing is way scary and are blowing holes through the propaganda being spewed in the news and are screaming quarantine. The "it is not a problem" propaganda gets old especially when you add the Canadian 2012 study and the question what the meaning of airborne is.
I understand not panicking people and the need for common sense look at the situation and that yes, we would have a better chance to put a stop to it before it got out of hand as long as it was not used in a large diversely released attack but at some point it is just sticking your head in the sand or you have an agenda.