How did the people of imperial nations use Eurocentrism to justify colonialism?

Answer: Eurocentrism through a religious prism / Ascension to a higher civilization level.

Explanation:

Europe was a center of Christianity during the colonial conquests. It was through religion that efforts were made to justify colonization. Using the dogmas of Christianity, the colonizers justified their actions by claiming that e. g., They bring salvation to Native American tribes through Christianity. The teaching of Christ is intended for all humankind and even unbelievers. The colonizers adhered to this thesis very much.

Also, colonization is justified in such a way that it is possible to impose one's power over the incompetent. The Spanish colonizers quickly became aware of the nudity, cannibalism, of the indigenous tribes. It was a sufficient indicator of natural disability. Based on the above, they considered how it is possible to bring the natives to a higher civilization level and introduce them to Christianity.