@EmmaWithTheGreatHair
I think here lies the problem - it's parents like you, who think that it is just fine for children to exhibit very antisocial behaviour - hitting, throwing things, screaming and yelling, refusing to cooperate with reasonable requests, using aggressive and rude language - and label this as just "wearing your heart on your sleeve". That is a ridiculous comment. Children have to learn to control their emotional outbursts by understanding what triggers them, and dealing with it maturely. There is absolutely NO positive spin on this kind of misbehaviour.
I'm really sad for your son being targeted by a sly girl. But if his response was to lash out, that's just as unacceptable as her behaviour. Two wrongs don't make a right.
By the way, I'm sure my DD can be irritating. But she has never thrown a book at someone's head in temper and caused injury. She has never scratched her work partner vindictively and drawn blood. She has never angrily pushed someone over in the playground (in this incidence DD was ticking off a boy who had attacked his female work partner in class, he didnt like being told off and shoved her so hard she had a graze that needed a plaster), she has never caused the entire class to cease work and go outside in the playground while one of the pupils played out a destructive meltdown, she has never called written naughty words on the whiteboard, she has never ripped up someone's work or deliberately hurled the contents of their pencil case on the floor, she has never grabbed a handful of PE equipment and hurled it round the playground (injuring another boy who had to be sent home because they thought his nose may be broken). All those things are done to her and her male classmates.
I'm not saying girls have no behavioural problems, but in my experience the girls' problems are typically different in nature. I don't want my DD growing up thinking it is just FINE for men to be violent, aggressive, to lash out verbally and physically when they are annoyed - while the girls just have to sit and take it, and in fact are REQUIRED by the teacher to sit through it day after day, not even allowed to sit with a friend and shelter from it.