If by /supporting/ we mean to accept that a large class of students speaks a divergent dialect of English at home, then I am all for it. Instruct children on American English but don't demean, discourage, or devalue them because of the dialect they grew up speaking.

I don't think the article or comment really supported teaching AAVE to the exclusion of American English, the article at least tries to point out that teachers often view AAVE as an indicator of low intelligence instead of a separate dialect and supports changing that stereotype.