Hmm, the issue is differnt to SARS and bird flu as they were never particuarly infectious and were fairly unlikely to kill you. Ebola is very infectious. The reason it has not been a global problem before is that it kills so many people and makes them so ill that an outbreak usually kills/disables its hosts from travelling far enough to let it spread. Evolutionarily it is a slightly crap virus for that reason unlike the common cold which you can walk around with etc.
However, previously people in these areas have not have access to automated, petrol fuelled transport which can take them a long way from the initial infection site before they get symptoms. That is actually quite worying.
The west is not particuarly well set up to deal with serious outbreaks of infectious disease as we have spent money eliminating deadly infectious diseases that could infect us ie smallpox and polio. That is great, but greedy western nations have not bothered to take infectious disease in other parts of the world seriously enough.
Result = the west being badly equiped to deal with a serious infectious epidemic from other parts of the world, that we were too busy worrying about our own problems to consider eliminating.
Already multiple resistant TB is a problem, and I am concerned that if anything did happen with Ebola that European healthcare systems would be ill-equiped to deal with as our health threats over the past 50years have been different.