This may help clarify his baffling decision not to circumcise his son. Even after his assumption of responsibility as the redeemer of Israel, he neglects his son's circumcision, perhaps reflecting his ongoing ambivalence surrounding his identity. Indeed, Moshe's task as redeemer of Israel does not automatically translate into the renewal of his identification with the Hebrew slaves. Moshe could easily identify with the moral underpinnings of the redemption with no connection whatsoever to his personal identity. Morality itself requires his involvement, and his work on behalf of the suffering stems from his firm opposition to injustice.
National identity is of no relevance or consequence.
Moshe then embarks on his mission and meets with demoralizing failure. The nation itself closes its ears, and the Egyptian king remains obstinate and resolute. However, Moshe's approach and mindset undergo a drastic change in the final verses of Parashat Shemot, after his humiliating confrontation with Pharaoh. After having endangered his life by petitioning the king on behalf of the slaves, he leaves the palace empty-handed, only to be assaulted by the nation's embittered leaders. Again, Moshe encounters betrayal and degradation from the very nation for whom he has sacrificed everything.