I do understand all of that. It doesn't change how he continues to insist how much Touma means to him despite his actions speaking the total opposite. If he had spent the entire arc solely feeling conflicted or thinking things over, that'd be one thing, but he doesn't. Until the last leg he very much goes for "attack first, never ask questions." If anything, his supposedly deep bond with Touma should make him the first person to have doubts, not the last.

[quote]As for friendship, the real criticism of the first part of the show was that friendship is built on nothing, and therefore can't be strong. Therefore, its disintegration and subsequent rebirth are precisely the process of strengthening.

Their friendship was built upon all that they had been going through at the time. Ontop of their shared relationship with Kento. Another thing that majorly bothered me about the start of the traitor arc was that from the very start, it's clear that everything Touma did for everyone meant basically nothing to anyone in the guild, given that they attack him before he even talks about there being a traitor, not after.

There's a difference between an argument and "I'm going to arrest you without even bothering to hear what you have to say."

It's not that Ren got nothing. It's that he got very little in comparison to everyone else. All of his stuff is mainly just setup for the next arc.