On point 1: Why are you moral?
What do you mean by moral? Why my behavior largely conforms to the societal norms? Because that is how I was brought up and it makes living among humans easier. Or are you asking why the societal norms are what they are?
There is a difference between descriptive and prescriptive. One represents the reasosn why we act. Prescriptive represents the reasons why we SHOULD act. Or in this case, having reflected upon the issue why you want to be moral instead of, say, trying to make yourself as amoral as possible.
Why would you reject that sort of course and instead try to be moral? That's the proper basis of a metaethical theory, from which ethical choices are made.
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.