Deontology is not in general incompatible. You could have a deontology that says :God says do exactly what eliezer yudkowsky thinks is correct.
That isn't a deontology. That is an epistemic state. "God says do X" is in the class "Snow is white" not "You should do X". Of course if you add "You should do exactly what God says" then you have a deontology. Well, you would if not for the additional fact "Eliezer Yudkowsky thinks that God saying so isn't a particularly good reason to do it", making the system arguably inconsistent.
My apologies if this doesn't deserve a Discussion post, but if this hasn't been addresed anywhere than it's clearly an important issue.
There have been many defences of consequentialism against deontology, including quite a few on this site. What I haven't seen, however, is any demonstration of how deontology is incompatible with the ideas in Elizier's Metaethics sequence- as far as I can tell, a deontologist could agree with just about everything in the Sequences.
Said deontologist would argue that, to the extent a human universial morality can exist through generalised moral instincts, said instincts tend to be deontological (as supported through scientific studies- a study of the trolley dilemna v.s the 'fat man' variant showed that people would divert the trolley but not push the fat man). This would be their argument against the consequentialist, who they could accuse of wanting a consequentialist system and ignoring the moral instincts at the basis of their own speculations.
I'm not completely sure about this, but figure it an important enough misunderstanding if I indeed misunderstood to deserve clearing up.