In sentence 2 of paragraph 14, what is the effect of juxtaposing the rate of change in Asia and African cultures with the rate of change in American Culture?

King asserts that changes for equality in other cultures are moving at "jet speed" while America is stuck: it is marred in old ideas of bigotry, still quibling about where black people can have a cup of coffee.

King asserts that changes for equality in other cultures are moving at "jet speed" while America is stuck: it is marred in old ideas of bigotry, still quibbling about where black people can have a cup of coffee.