During George Floyd's justice demonstration, many white people joined the crowd, bringing with it the expectation of great change in society.

As crowds flooded the streets of the United States to protest against the death of a black man by George Floyd, one of the most striking differences from the past was the appearance of mirrors.

From Minneapolis to Washington, many protesters realized this change and wondered if whites were also trying to fight for the justice of black Americans.

"I was shocked to see so many white children here," said Walter Wiggins, 67, a protester in Washington last week.

A video of a white police officer last month knelt nearly 9 minutes on the back of a black man George Floyd in Minneapolis, Minnesota, causing the death to stun the entire United States, amidst the official

"Everything is going on completely different from anything we have ever seen," said Douglas McAdam, a sociologist specializing in social movements at Stanford University.

Since the death of black Michael Michael in Ferguson City, Missouri in 2014, every casualty of African-Americans at the hands of police has caused protests to erupt, but "mostly only in the black community."

On June 6 and 7, researchers conducted surveys in three US cities and found that many crowds were made up of young, white and well-educated people.

Researchers Dana R. Fisher, sociologist at the University of Maryland, and Michael T. Heaney, political scientist at the University of Michigan, said the figures provided a more structured first look.

Not only protesters, white Americans are also going through a process of self-change.

"All the whites on the front lines finally protested and returned to their neighborhoods with whites and better school systems," said Hakeem Jefferson, a political science researcher at the University.

Although racial polls do not always accurately reflect the minds of people, surveys show that the attitude towards racial ethnicity of white Americans is changing.

Different ethnic groups tend to be the most friendly to their skin color group.

This change is reflected in a survey by the Pew Research Center.

On the other hand, young Americans today are more racist than the previous generations.

"My parents have a lot to learn," said 22-year-old Isabel Muir, a recent graduate who joined a protest outside St. Peter's Church.

Muir said she discussed on social media and with her mother how to become a "white ally".

Her mother, 62, felt dissatisfied with the physical damage caused by the protesters.

President Donald Trump also seems to have become a powerful driver for many to join the rally.

Since 2017, about 27 million people have participated in protests against Trump, or 8% of the population, according to researchers from Harvard University and the University of Connecticut.

In a recent poll by Monmouth University, 71% of whites participated in answering the question that racism and discrimination are "big problems" of the US.

But Dr. Jefferson from Stanford University is cautious.

Karyn Wills, a 57-year-old African-American doctor, said she felt hopeful when participating in protests in Washington on June 6.

"Some people come here out of curiosity but many really want to make a difference," she said.