Nope. My idea of a "constructive manner" does not include sugar coating the obvious truth.
Who cares what your idea of a "constructive manner" is, there was NOTHING constructive in what you said.
con·struc·tive
–adjective
1. constructing or tending to construct; helping to improve; promoting further development or advancement (opposed to destructive): constructive criticism.
2. of, pertaining to, or of the nature of construction; structural.
3. deduced by inference or interpretation; inferential: constructive permission.
4. Law. denoting an act or condition not directly expressed but inferred from other acts or conditions.
If you wanted to be a d*ck but still be constructive you might have said something like, "Are you an idiot? anyone with half a brain could see that the best thing to do would be to get off your butt and make more then a half-arsed attempt at contacting him".