I would say immigrants or children, because it was both.
The emergence and spread of Islam threatened the power and prosperity of the Catholic Church from the beginning, i.e., the fall of Jerusalem in 636. From then on Muslim armies took all the important cities of Christianity, such as Damascus or Antioch. Muslim armies relentlessly attacked christianity centers, including the siege to Vienna in the 1520´s.
Answer:
Some of the negative impacts that are associated with colonization include; degradation of natural resources, capitalist, urbanization, introduction of foreign diseases to livestock and humans. Change of the social systems of living. Nevertheless, colonialism too impacted positively on the economies and social systems.