Read the excerpt from "Children of the Drug Wars.”

By sending these children away, "you are handing them a death sentence,” says José Arnulfo Ochoa Ochoa, an expert in Honduras with World Vision International, a Christian humanitarian aid group. This abrogates international conventions we have signed and undermines our credibility as a humane country. It would be a disgrace if this wealthy nation turned its back on the 52,000 children who have arrived since October, many of them legitimate refugees.

The underlined words and phrases have strong negative connotations. How do they support the author’s purpose?