Mexicans Americans and immigrants/how did Jews become white folks?

In the article " Mexican American and Immigrant Corporation by Edward E . Telles, Telles discusses how Mexican immigrants lifestyles and behaviors change over time after coming to America as generations pass on. I feel it's like that with every race and ethnicity. In the article"How Did Jews become white folks? By Karen Brodkin, Brodkin  and how race and racism continue to persist. In addition, particularly how the boundaries of whiteness are defined in relation to "black" and "others" as saying what should be..