Well, I think we can all agree that the main concern is that these people coming here from the hot zone should not suffer any inconvenience whatsoever. After all, unlike the soldiers who were sent there, they did it voluntarily and are thus heroes. Who are we to stigmatize them and rain on their parade of self-congratulation, just because they may be bringing in a deadly disease that we know little about, including most importantly, how it is spread?
The important thing here is to uphold one of liberalism's basic principles, which is that grandstanding do-gooders' get special rights and privileges, unless they are conservatives.