This passage expresses some of the negative attitudes that English settlers had towards American Indians.
First, the quotes serve to highlight the fact that colonists did not feel particularly bad for the deaths of the natives, as they show no empathy towards them. They were most likely indifferent to the loss of culture and the disruption of family life that this caused as well.
Moreover, it shows that they knew the reasons why the Indians were dying (smallpox), but had no interest in taking any measures to prevent it.
Third, they show a sense of entitlement over the lands of the indigenous people. As most of them have died, and the population cannot defend itself, they have no problem in taking their land forcefully.
Finally, by comparing themselves to the Spanish, they also show awareness of the destruction and chaos that colonial powers have created in other places, and are thankful that they did not have to engage in a difficult war with the Native Americans.
Hamilton wanted to add the taxes for the whiskey and Jefferson didn't want that tax. This tax was so America could get out of debt. Hamilton got his way untill people started rebelling. Then Jefferson made sure that when he became president that he would repeal or remove this tax.
The idea that Horace Bushnell was associated was religious liberalism.
