[skrbjc]

For the first article: "The study, which was published Monday in the Archives of General Psychiatry, controlled for variables like socioeconomic status because rates of severe drug problems tend to be greater amongst the poor. Despite this, Native American youth fared worst, with 15% having a substance use disorder, compared to 9.2% for people of mixed racial heritage, 9.0% for whites, 7.7% for Hispanics, 5% for African Americans and 3.5% for Asians and Pacific Islanders."

You can get into a debate about the merits of controlling for factors, but the title is somewhat misleading. They are suggesting that whites have higher rates of drug use when you control for factors like socioeconomic status, not that the hard numbers show that whites use more drugs than blacks.

The second article is literally two paragraphs with no actual data other than an infographic. I think you need some better sources if you want to make the claims you are trying to make.