Answer: When writing in first-person, the story the author is telling becomes much more personal, and therefore makes readers feel their emotions much more than if a narrator was describing the way a person in the story felt.
No word choice shown but for example "go, search, roam and travel" are used to show the wide scope of the investigation of barbaric practices in the world and then "revolting barbarity and shameless hypocrisy" are two strong expletives that show the degree of horror of the practices of the US at least according to this author.
