I once saw a professor talk to us with AAVE right until the moment a black guy walked into the classroom. The most embarrassing shit I've seen a professor do, and I've had professors explain the virtues of the bile balancing approach to medicine.

Yes, exactly this.

And using signifiers black people use with other black people makes whites feel like they’re participating in progressive thought, but tends to end up alienating minorities instead. There are some white people who use AAVE from growing up poor, but they have less of a faux-academic vibe.

One of my best friends growing up has become an insufferable lib, and rants on Facebook about how horrible the latter is while constantly doing the former.