You’re reading something that a friend has written in conjunction with a link that they’ve shared, that has appeared on your wall. The topic of said link is something that could be perceived that of sensitive nature. A few comments in response are visible, and you see that there is someone who is clearly passionate about the topic of the story within the link, as their comments are verbose, and in spite of the difficulty of conveying tone through text, manage to carry somewhat of an edge, bordering in almost anger, in their written tone. This is quickly confirmed when you read on, and see that they are questioned, to which their ensuing responses are defensive and hostile.
As the kids would say it, “they mad.”