When Donald Trump used the word “criminals” to describe illegal immigrants from Mexico, the Republican National Hispanic Assembly called his comments “extremely counterproductive.”

Now, listen to the more personal language that Gonzalo Ferrer, the national chairman of the group, uses to describes Mr. Trump’s most recent contributions to the immigration debate: “Extremely bigoted, offensive to all Hispanic-Americans, unconstitutional . . . and self-defeating.”

Mr. Trump, he said, shows “reckless disregard for the harm he is causing to Republican Hispanic-American families and to the Republican cause.”