Answer:
Ring's reasoning comes from racist situations in which he was previously a victim.
Step-by-step explanation:
This question is about "Fallen angels" written by Walter Dean Myers. The book portrays the Vietnam War and the difficulties faced by people as a result of the war and prejudices that operated in society.
When Ring says that "whitey" cannot be trusted he is stating that white people will not help any black person when necessary, on the contrary. This reasoning is the result of cases of racism that Ring was a victim of, which makes him sure that white people are not to be trusted.