Death rate is important, but not at all the only important factor. If Ebola victim dies before spreading the virus, it’s tragic enough for the victim, but not nearly so bad as if the virus had been spread to many others. The fact that people can be carriers of coronovirus, for weeks, makes it different. From a public health perspective, is it better to have 100 Ebola cases or 10,000 coronavirus cases? Well, a month later, those hundred Ebola cases may be down to zero or close to it, but the 10,000 coronavirus cases may have increased to millions of cases. The restrictions on air travel to US from China and Europe is absolutely life-saving here - perhaps millions of avoided deaths here just by May.
Millions could be killed? Here? That’s ridiculous.
Most viruses are contagious primarily before symptoms, but I don’t know if Ebola is one of those or only after. Furthermore Ebola IS contagious for weeks after via contaminated surfaces so a dead person does not stop the danger.