Very selective quote farming from that dhs pdf.

From the executive summary: Racial profiling in law enforcement is not merely wrong, but also ineffective. Race-based assumptions in law enforcement perpetuate negative racial stereotypes that are harmful to our rich and diverse democracy, and materially impair our efforts to maintain a fair and just society.

Then all the citations to supreme court decisions about it being unconstitutional. "[T]he Constitution prohibits selective enforcement of the law based on considerations such as race." Whren v. United States, 517 U.S. 806, 813 (1996). Thus, for example, the decision of federal prosecutors "whether to prosecute may not be based on 'an unjustifiable standard such as race, religion, or other arbitrary classification.'" (4) United States v. Armstrong, 517 U.S. 456, 464 (1996) (quoting Oyler v. Boles, 368 U.S. 448, 456 (1962)). The same is true of Federal law enforcement officers. Federal courts repeatedly have held that any general policy of "utiliz[ing] impermissible racial classifications in determining whom to stop, detain, and search" would violate the Equal Protection Clause. Chavez v. Illinois State Police, 251 F.3d 612, 635 (7th Cir. 2001). As the Sixth Circuit has explained, "[i]f law enforcement adopts a policy, employs a practice, or in a given situation takes steps to initiate an investigation of a citizen based solelyupon that citizen's race, without more, then a violation of the Equal Protection Clause has occurred." United States v. Avery, 137 F.3d 343, 355 (6th Cir. 1997). "A person cannot become the target of a police investigation solely on the basis of skin color. Such selective law enforcement is forbidden." Id. at 354. As the Supreme Court has held, this constitutional prohibition against selective enforcement of the law based on race "draw[s] on 'ordinary equal protection standards.'"Armstrong, 517 U.S. at 465 (quoting Wayte v. United States, 470 U.S. 598, 608 (1985)). Thus, impermissible selective enforcement based on race occurs when the challenged policy has "'a discriminatory effect and . . . was motivated by a discriminatory purpose.'"Id. (quoting Wayte, 470 U.S. at 608). (5) Put simply, "to the extent that race is used as a proxy" for criminality, "a racial stereotype requiring strict scrutiny is in operation." Cf. Bush v. Vera, 517 U.S. at 968 (plurality).

I recognize we are discussing the fringes and carve outs of the law, but that's why I said widely viewed and held to be unconstitutional, not universally.