No they are just petty and dare I say, tribal - nothing wrong with wanting to promote your own actors but you can't dictate how studios cast unless you have some political backing and wealth. Did the same to Thandie Newton - her mom is African. See below.
Unfortunately American actors no matter the color will be replaced by foreigners like Christian Bale. I love Brazilian movies. The actors are often trained in theatre a s well cinema and are good. Not to mention
cheaper and wont demand rights. Hollywood execs are growing weary of pesky unionized actors/writers and their strikes and wage demand.
There are others who have taken a similar stance in respects to non-Africans playing the role of Africans in film. Fairly recently, Thandie Newton, who is half English and half Zimbabwean, found herself in the midst of a casting controversy after being selected for the lead role in the film production of Chimamanda Ngozi Adichie’s Half of a Yellow Sun. Many people took issue with Newton not being Igbo enough for the film version of the book, which chronicles the lives of several characters during the course of the Biafran War that took place in Nigeria from 1967 to 1970. There is even a petition to protest the casting, claiming that “Igbo people, like any other people range in physical characteristics as well as complexion. However, the majority of Igbos are dark brown in complexion. Igbo people do not look like the bi-racial Thandie Newton. Newton is an accomplished and talented actress in her own right. However, she is not Igbo, she is not Nigerian, and she does not physically resemble Igbo women in the slightest.”