As to the first question, why were the Communists so appealing compared to the nationalists,
1) the nationalists were obviously corrupt. Chiang Kai Shek was a political operative you gained power by making deals with various corrupt people.
2) the nationalists were seen as self-serving wimps. During World War II China was invaded by Japan. Chiang predicted that the US would kick the s*** out of Japan. He also predicted that after the war the Communists would attempt to rise to power. So he withheld forces and did not fight hard to kick the Japanese out of China , instead opting to wait for the u.s. to beat up Japan. In contrast, the Communists were fighting extremely hard against the Japanese to liberate China. Obviously the people of China saw the Communists as the more patriotic force.
It was in 1820 that Congress passed a law banning slaves and giving them rights but was mostly ignored.With the rights it took a while for blacks to be recognized on how they had less rights then white men.
Susan B. Anthony and Emmeline Pankhurst; willing to get arrested and stand up for what they believe in, proved to be nonpolitical: They were trying to get the right to vote, showing that women have a stance on government issues, and were welcoming the NACW even though they were black women
D. Andrew Jackson made an act "Removal Act" forcing Native Americans to move to another land, causing Trail Of Tears. Many had died by starvation and no warmth through the way. Americans wanted resources like gold, found in the Native American.