Is it sexist to have this mindset?
I guess I'm opposite to most men who say "I don't care what she did, you don't ever put your hands on a w*man in anger". Guys like Dr Phil and Steve Wilkos for example.
Now if men do such similar acts towards a female like cheat or else, there has to be a reason. It was an honest mistake. She could have done something bad like cheated first or plotted against him.