Who could blame him if he lost his rag?
No one.
The OP doesn't have to listen to it though. She really doesn't.
Oh I really think she does, actually. I think that's the very least she can do, is to listen to him and try to really feel how hurt and devastated he is.
Only on MN could the OP's husband ranting and calling her a few choice names (entirely understandable under the circumstances) be labelled her 'being abused.'
Yes, mn is for supporting people but what if an unfaithful man posted here for some support? Would be get that support? Would he bollocks, he would be thrown to the lions.
The simple fact is that for a man, this wouldn't be considered a 'support thread.' There would be no soothing platitudes of 'poor you,' 'stop telling the poor man off', 'I really feel for you,' 'best of luck' etc. etc. someone even sent the OP
because the poor little love feels bad a what she's done. So that's nice. 
Look, I don't object to the fact that she is getting some support to come to terms with what she's done, I just wish it was a bit more even handed and less bloody hypocritical around here sometimes.