Final answer:
Xenophobia is an unreasonable dislike for a particular group of people based on race or nationality.
Step-by-step explanation:
An unreasonable dislike for a particular group of people based on race or nationality is called xenophobia. Xenophobia is an irrational fear or hatred of different cultures. It is important to understand that xenophobia is not based on any rational or factual basis, but rather on prejudiced beliefs and stereotypes.