Is discrimination in our public schools acceptable?

I am appalled that in 2014 this question even is asked.  Apparently there are those that do not think the government should be involved in matters of discrimination.  If not the federal government, then who?  Anti-discriminaton is a federal law and needs to be enforced just like any other law. 

Below on this board there is a post regarding an article of outrage because the Departments of Justice and Education sent out a letter to schools regarding discriminatory punishment in the schools. 

Here is a link to a copy of the entire actual letter that was sent to the schools:

http://www2.ed.gov/about/offices/list/ocr/letters/colleague-201401-title-vi.html

In a nutshell, here is a bit:

Dear Colleague:

The U.S. Department of Education and the U.S. Department of Justice (Departments) are issuing this guidance to assist public elementary and secondary schools in meeting their obligations under Federal law to administer student discipline without discriminating on the basis of race, color, or national origin. The Departments recognize the commitment and effort of educators across the United States to provide their students with an excellent education. The Departments believe that guidance on how to identify, avoid, and remedy discriminatory discipline will assist schools in providing all students with equal educational opportunities. ^{. . .}

. . . The Civil Rights Data Collection (CRDC),⁵ conducted by OCR, has demonstrated that students of certain racial or ethnic groups⁶ tend to be disciplined more than their peers. For example, African-American students without disabilities are more than three times as likely as their white peers without disabilities to be expelled or suspended. Although African-American students represent 15% of students in the CRDC, they make up 35% of students suspended once, 44% of those suspended more than once, and 36% of students expelled. Further, over 50% of students who were involved in school-related arrests or referred to law enforcement are Hispanic or African-American.

The Departments recognize that disparities in student discipline rates in a school or district may be caused by a range of factors. However, research suggests that the substantial racial disparities of the kind reflected in the CRDC data are not explained by more frequent or more serious misbehavior by students of color.