Answer:
Americans did justify their acts of imperialism by claiming that it was their responsibilty and claiming it was God's will.
Explanation:
Claiming that it was their responsibility. Americans and Europeans both claimed that it was their responsibility as superior races to uplift, civilize and Christianize native peoples. This was known as the White Mans Burden and was based upon the ideas of social Darwinism.
Claiming it was God's Will. Many Americans felt it was not only our responsibility and duty but it was also a mandate by God. One of the leading proponents of imperialism was Minister Josiah Strong. Minister Strong argued that America was in a race with other nations to dominate the world and acquire the limited resources the world had to offer. Strong claimed that America was the leading nation in the world (arguable at the time!) it was our destiny to acquire new lands. This idea sounds a lot like Manifest Destiny because it is the same idea!
Resource Used:
http://www.socialstudieshelp.com/USRA_Imperialism_Justify.htm
I hope that this helps you in any shape or form.
