Race relations between Anglo Americans and Mexicans/Mexican Americans

Race relations between Anglo Americans and Mexicans/Mexican Americans shifted drastically after the War for Texas Independence and the Mexican American War.  While relations were often civil and mutually beneficial before these wars, they soon soured as Mexican Americans experienced various forms of oppression.  Overall, what were relations like between Anglo Americans and Mexican Americans after Texas Independence and the Mexican American War?  To fully answer this question, please respond to the questions below:

How were Mexican Americans supposed to be treated after the Mexican American War, according to the Treaty of Guadalupe Hidalgo?
What were examples of oppression experienced by Mexican Americans after the Mexican American War? (This question will cover the majority of your essay. Make sure to give several examples of how land was taken from Mexican Americans in New Mexico, California, or Texas through both violence and the legal system).
How did Mexican Americans fight back, or resist, their oppression by Anglo-Americans?
How did some Californianas maintain a degree of power and aspects of their Mexican American (Californio) identity, even though they married Anglo American men ?

Please only use the sources given