Answer:
Radical Republicans believed that African Americans deserved immediate freedom from bondage and should receive the same rights as whites. Radical Republicans favored granting civil rights to African Americans for various reasons. Some radicals truly believed that African Americans were equals to the whites.
Explanation:
1 . The meaning of boo is to suddenly surprise someone.
Or , to show dissatisfaction and disapproval.
Also, a slang you could call your lover.
2. A boo could mean boyfriend or girlfriend .
3. Anyone calls anyone boo I guess .
He supported them because he wanted later to make a treaty with panama to construct the panama canal.