What arguements does Loewen use to support his contention that opportunity is not equal in America? How do immigrants support or challenge his views?

Check out this quote,

The notion that opportunity might be unequal in America, that not everyone has ““the power to rise in the world,”” is anathema to textbook authors, and to many teachers as well.” (34)

Certainly immigrants who come working for sub par wages and living in relative poverty illustrate that equality and opportunity is the exception rather than the norm.