Well irony means that it's the opposite of what is being said
"You know what we want," another man said. "Get aside from the door, Mr. Finch."
"You can turn around and go home again, Walter," Atticus said pleasantly. "Heck Tate's around somewhere."
"The hell he is," said another man.
"... Called 'em off on a snipe hunt... Didn't you think about that, Mr. Finch."
<span> "Thought about it, but didn't believe it. Well then," my father's voice was still the same, "that changes things, doesn't it?"</span>
The purpose of this piece of text is to inform the reader. I reckon that the source is from the Declaration Of Independence.
The main ideas shaping US imperialism were "Manifest destiny" and the "White man's burden". Manifest destiny refers to the 19th century belief that the United States were meant to expand across North America because of the particular excellence of its (white) people and (democratic) institutions. This lead to the Trail of Tears, among other atrocities. Once the US reached the Pacific Ocean, new lands came into view (Puerto Rico, the Phillipines). Manifest destiny became entwined with the idea that "civilized" nations had a moral obligation to colonize other peoples, which Rudyard Kipling summed up in his poem "White Man's Burden". The tensions in this "benevolent imperialism" were never fully resolved; the US invasion of Irak was launched under similar pretenses (the invasion was "for the good" of those invaded). The idea that other peoples have a right to self determination regardless of their level of development has not yet become accepted by the great powers, including the US.
After the storm, no one could get in or out because of all the trees in the road.