Question

Why does Jefferson begin with points about human rights before discussing the colonist specific grievances

Answer 1

Jefferson is preparing to contrast the rights that the colonists claim with the kings behavior

Answer 2

Regarding the Declaration of Independence of the United States of America, Thoman Jefferson makes an introduction in the preamble stating the innate rights of colonists and how these are acknowledged by the self-proclaimed representatives of the colony, unlike the king who is accused of having  violated these rights with the list of grievances that follows in the document.

This introduction is done with the purpose of demonstrating why the king of England is unfit to rule over the colonists, and to have him indicted for crimes against humanity.