Final answer:
Paragraphs 11 and 12 suggest that Jackie Robinson was supported by people of various backgrounds, not limited to race or age, highlighting a shift toward racial equality through his influence in baseball.
Step-by-step explanation:
The message conveyed in paragraphs 11 and 12 of the text about Jackie Robinson is that his race was not a barrier for many of his supporters, who came from various backgrounds and demonstrated their support regardless of societal prejudices. The text highlights children's innocence and lack of prejudice, as well as the support from a diverse group of adults. It emphasizes that Robinson's talent and character won over fans and supporters beyond just the black community and the youth, suggesting an evolving social attitude towards racial equality in the context of his groundbreaking entry into Major League Baseball.