Or he could have done what most people do when they get tired of a bully: clocked Incognito in the face. Instead, Martin exchanged those same messages with him until he snapped. If Martin's play on the field didn't tell you that he's soft, this should.
Explain to me a couple of things, then...
1. How were Incognito and Martin supposedly seen as friends around the locker room?
2. If Incognito was picking on Martin because he was silent, and it was all meant in a way to crush Martin's spirit and single him out, why was it reported that he got Martin's back during a fight with a defensive lineman in practice?
If Martin has some underlying depression or some kind of other mental issues, I don't think it's a stretch to think Martin might have done whatever he could to try and stop the ball busting, including of pretending to be his friend/acting as his friend. Sort of a Stockholm Syndrome. Given that Martin comes from a family that is more intellectual, it's possible he'd never been exposed to the behaviour in the Dolphins locker room and didn't know how to deal with it. I know some guys that would have clocked Incognito after a certain point, but I also know some guys that would try and get him to stop with words, and if that failed, they would try and escape the situation. For that reason, I wouldn't call Martin 'soft' as much as ill-equipped to handle the situation.
In regards to you second point, i think the offense versus defense thing overrides the individual thing. An attack on an individual in a group is often seen as an attack on the whole group.
Can you describe specifically what actions were way, way over the line in your opinion?
I believe you were referring specifically to the Martin/Incognito interactions, but I think the way the trainer was treated is goes beyond over the line. At least with Martin and Incognito you have two men on more or less equal standing. Both about the same physical size, both starters on the O line, both making large amounts of money. Compare to the trainer, who is (I am assuming) no where near the size of the linemen, makes no where near the money the players do, and has no where near the importance to the team. His options are pretty limited when facing the abuse. What does he pick - his job or his dignity?
Lots of disagreements on the thread, but hopefully everyone can agree on the following:
1) Incognito is a the epitome of a bully and a d-bag.
2) Martin didn't have the mental toughness to handle the Dolphin's locker room
3) The Dolphins had a locker room that was more extreme than others, and perhaps dysfunctional.