I'm not talking about UV as a general means of sterilizing Ebola virus. I'm talking about it as a specific means of sterilizing Ebola in FOMITES, i.e., of reducing the danger of transmitting Ebola virus from inert surfaces to humans. Here that means disinfecting buildings.
And I agree that UV can't penetrate the surface of clots of relatively recent Ebola-laden secretions such as patches of blood, clots of mucus, with significant viral loads.
But UV can nail the lesser viral loads of smaller drying particles of secretions by Eobla victims, particularly those fixed in place on fomites and so subject to UV radiation from portable UV sources.
UV works. Problem then becomes the delivery method to access all infected areas.
Example of a handrail on a stairway. If the fomite is placed from the edge of the fingertips of the infected person onto the outside diameter of the rail closest a stairwell wall, with only 1-3 inches of clearance, how does one simply expose those surfaces to UV. Same for splattered surfaces (underside rim of a toilet, to access all 70nm particles, and expose for an adequate time with adequate enegry to disinfect.