Final answer:
Sarah Phillips likely views the Sons of Liberty as traitors because their actions against the Federal government during the Civil War were branded as treason by Republican media and their revolutionary activities could be similarly regarded from a Loyalist point of view.
Step-by-step explanation:
Sarah Phillips likely thinks the Sons of Liberty are traitors because during the Civil War era, they broadcasted their opposition to the Federal government and were associated with the Democratic party of the North, which was not in favor at the time.
They were implicated in multiple "conspiracies" by the Republican press, who labeled their acts as treasonable, such as plots to overthrow the government or to create diversions that would compel the Union to reallocate its troops. This viewpoint aligned with the Republican message that highlighted Democratic "treason" as a focal issue.
Meanwhile, during the Revolutionary era, the Sons of Liberty were also aggressive proponents of colonial rights and freedom, which would be seen as traitorous from a Loyalist perspective.