Czechoslovakia is the correct answer
the peaceful demonstrations would be met with violent attacks using high-pressure fire hoses and police dogs on men, women and children alike -- producing some of the most iconic and troubling images of the Civil Rights Movement. President John F. Kennedy later said that, "The events in Birmingham... have so increased the cries for equality that no city or state or legislative body can prudently choose to ignore them." It is considered one of the major turning points in the Civil Rights Movement and the "beginning of the end" of a centuries-long struggle for freedom.
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Answer: It encouraged the U.S. to desegregate, because the Soviets claimed they supported equality for all people.
Explanation:
The United States kept claiming to be the beacon of democracy and equality around the world yet she was segregating against members of her own citizenry by keeping black people against from white people.
The Soviet Union always seized upon this to show the world that the U.S. was not actually equal and that the Soviet Union was more equal than the U.S. This was during the time of the Cold War and the U.S. did not like the fact that the Soviets held the moral high ground and so actively tried to end segregation.