Based on the excerpt from Thomas Jefferson's Declaration of Independence, the author would most likely support the scenario where "A group of concerned citizens protest what they believe are unjust immigration policies."
This scenario aligns with the ideas expressed in the excerpt, which emphasizes the rights of individuals to have unalienable rights and the right of the people to alter or abolish a government when it becomes destructive to those rights. Protesting against perceived injustices is a form of exercising the rights to life, liberty, and the pursuit of happiness.