Final answer:
In the 1970s, bands and individual performers no longer tried to disguise their identity as Americans of Mexican descent due to the rise of immigration from Asia and Mexico in the United States.
Step-by-step explanation:
In the 1970s, bands and individual performers no longer tried to disguise their identity as American of Mexican descent. This shift in music identity can be attributed to the rise of new waves of immigration from Asia and Mexico in the United States during that time.