I think the fact Obama opposes the travel ban goes well beyond any science issues.
If he signals that it is ok to keep certain people out of the US, he’s now created a precedent regarding his open borders policy. If we can make an exception today to keep people (primarily black) out for Ebola, even if temporary, then tomorrow the sheeple will want to keep the Mexicans, Haitians, etc out. It makes his reported goal of declaring amnesty right after the Nov. 4th elections more problematic.
An Ebola travel ban is a slippery slope for him and an existential threat to his immigration policy.
There we have it....... two words and a succinct explanation
existential threat