Why was Emmett till kidnapped?

Emmett Till was kidnapped because he lived in the south during the time of the Jim Crow laws. The laws were particularly harsh, and it created what was basically a racial Caste System. Blacks were viewed as lower beings. In this specific case, Emmett Till whistled at a white woman. She was offended. Her husband and brother in law invaded the home of Till's uncle, snatched Till from his bed, tortured, and murdered him. In that time and place, many people thought that was a perfectly okay thing to do. Many years later, Emmett's cousin said he could still clearly hear that whistle in his head, because he knew as soon as it cut through the air that they were in trouble.