PHILADELPHIA — A.J. Brown has been at the center of a pretty strange controversy over the last six days — strange if you don’t know anything about him, strange if you’re not someone who lives on the internet. In fact, if you don’t spend several hours a day on Twitter/X or other social media, you might not know that A.J. Brown was at the center of a controversy at all. But he has been, and the topic is worth explaining and exploring, because it says as much about the modern media environment, about a significant segment of our culture and society, as it does about A.J. Brown. After the Eagles’ …