Of course, if someone gets offended they aren't "right" by default. The word "bro" is not offensive but people are using it to shoehorn in bigger issues they feel passionately about. It's like when someone is rabid about politics and tries to force it into conversations (thinking of an old family member here that goes on about Obama being a socialist at the drop of a hat). Clearly, the list you linked to is, for the most part reasonable. But reading this thread, there's that same propagandized vibe of people who have lost perspective.
On the other hand, there's a comment in here about a guy who said the people who used to beat him up used the word "bro" all the time. He was obviously traumatized by that, so his visceral reaction to the word is completely understandable. I can only speculate that others in this thread that genuinely are offended by the word "bro" in this context have had experiences that make them react similarly, whether it's physical assault, things said to them or being marginalized at work. I can have empathy for these people, but it doesn't make naming this tool bropages offensive.
Edit for clarity.