Albert Einstein's diaries express a constructive criticism molded by a competitive European culture notorious for criticism. The diaries follow his travels in Asia and the Middle East from October 1922 to March 1923.
In his writings he calls the Chinese "industrious, filthy, obtuse people". He saw the world through physics and he observed everything, giving detailed descriptions of occurrences and raising questions to every issue.
He deduced that social conditions were attributed to the genetics of it's population.
Einstein would later in life advocate for civil rights in the US, calling racism "a disease of white people". Scientifically, anti-social behavior is considered an illness associated to a person's genes.
The physicist arrived in Egypt and facing "Levantines of every shade... as if spewed from hell" he protests of people who come aboard the ship to sell their goods and pick pockets.
"My wallet has been taken and I need to buy lunch!" screamed Einstein, in desperation.
In Colombo in Ceylon, he says about the population: "They live in great filth and considerable stench down on the ground, do little, and need little."
Einstein was not a raciest, only a scientific observer who worried about human existence.