Really? Was it over the Plinkett reviews where the character of Plinkett makes some off color jokes, or because RLM didn't want to get involved in some internet culture wars crap and didn't give Black Panther a 200 out of 10 for being the first black superhero movie?
Either way its a very scummy thing to do to use a meme of someone to leach off their popularity and call them a bad person in the process. Its like that Dr Who audio drama where he meets H.P. Lovecraft, fights some of his monsters, and calls him a horrible racist. Using a more popular, talented persons work to boost your own, and then attacking them because they don't confirm to your current year sensibilities.