The characters in the cartoon show are intentionally Asian/Inuit. Giving them blue eyes doesn't magically make them not brown or negate every other cultural characteristic that the creator gave them.
Yep, but it doesn't mean that they have to played by Asians/Inuits. They should be played by people that resemble the characters, and that should be it.
That the actors are white is besides the point. The bottom line is that they don't look the part period.