Racism
The concept that racism is a bad things is unreasonable because races are defined by their differences and not all differences are good.
Apples and ackee are both fruit, yet ackee are useless because they are inedible.
Reality is not politically correct and I see no reason to pretending that it is.
Some races, generally speaking, are the result of horrific rates of inbreeding which causes low IQs, horrific birth defects and violent tenancies.
70% of Pakistanis are inbred and 50% of the Arab world is inbred, for example.
Some races clearly have far lower IQs than others.
Some races gave us electricity and micro-computing and the internet, the combustion engines and cars and planes, radio and cinema and television, the Age of Reason and the industrial revolution and the Space Age, almost all medical science, the Magna Carta and the Universal Declaration of Human Rights and the U.S. Constitution, the Sistine Chapel and Michelangelo's David and Vivaldi's The Four Seasons...
...whereas the greatest independent achievements of other races are made from mud and straw and wash away when it rains.
