what you guys dont understand is that the only true way to stop ebola from coming into this country is total isolation.
People understand that just fine. You, however, seem to think that if you can't make a risk zero that it's not worth reducing at all.
and none of those countries have banned travel from infected countries.
Yes, many countries have not put in place travel bans. But 5-10 African countries have done so.
Consider cockpit armor. It doesn't preclude 100% of shots hitting the pilot. Should all nations therefore have forgone cockpit armor? Of course not. It made a significant difference because it significantly reduced risk for an acceptable cost (in this case, for an acceptable weight and acceptable small reduction in performance).