Answer:
This is a historical allusion to the horrible, discriminatory treatment that African Americans have experienced over the years.
Step-by-step explanation:
A few examples you could use:
- Segregation
- Literacy tests + voting rights
- Jim Crow Laws
- Slavery
Jackie Robinson is saying that it is hard to have self respect when a country has done nothing to support you and has basically turned their back on your struggles and has enabled them.