So, while you are technically correct that the EFSA has not in fact "concluded" that the bees are dying because of the pesticides, I cannot help but question whether you merely being overly pedantic, or downright disingenuous. The context in which the EFSA qualified their findings has more to do with the methodology of the studies studied by their study than the discovery of any data to indicate that their conclusions may be invalid. Given that, in response to this study, the E.C. called for a two year ban on some of the pesticides in question, I'm not sure what the point you're trying to make is.
The point is that finding that said pesticides are harmful to bees is not the same as finding that colony collapse disorder is caused solely or primarily by those pesticides. Assuming so may blind you to other important factors. I really don't get what's so hard to understand.
