What effect does this have on her sons' inabilities to construct their own mixed race identities?

Tomas is Ika’s eldest son symbolizes a whole generation of young men that struggle with their biracial identity. Tomas is the product of two races and two cultures---neither of which can provide him however with a satisfying answer to the question “Who am I?” Tomas is belligerent and there doesn’t seem to be any clear reason for his rage but it can be surmised that part of his anger is rooted in that sense of constantly being the odd man out.