How to Handle that?!

Assalamualaikum :)

actually maybe i should turn my smiley upside down :(

because recently, i witnessed my friend (A) got scold at really bad by another friend (B). it was all a misunderstanding and B was known to be bad-tempered but B should never have lashed out at A. the matter was minor and another party unknown by A was involved, (C). it turned out that C was the one misunderstood and when C told A, the matter just got worse. A is nice enough but B got it into his head that A is just wrong. so that left me mad because B should have investigate, B shouldn't be so emotional to justify straight out that A is wrong and who the he** is C to interfere!!

i get so mad knowing this but relieved that A handle it well, A was frank and confronted C, at last C apologized and said that how would C know that B would react so harshly, well, maybe C shouldn't have said what C said in the first place huh?!

now A and B, their friendship is a question mark because both are avoiding each other, i get so sad :(

what could i do? i want to blame C but B was just so wrong! i felt like i want to blame them but blaming is not gonna solve the problem but if you get so mad, don't you just feel like blaming others? i strongly believe, knowing A that A was a victim, and that people like B should be kept at arm's length but then both are my friends for a long time, and that's something i can't push aside...

it's just so incredulous that we're all grown up but behaving like this, and is everyone like this?! do everyone go through petty stuffs like this?!

and of course it matters but it is reallyyy that important???!!!