He's obviously behaved like an idiot if it's true, but I'm not sure what there is to learn from this. We know that there are violent individuals in every walk of life whether talented musicians, politicians or road sweepers. Of course this sort of thing will be reported, but it hopefully won't stop people listening to Journey.
Maybe Dean will come out and speak against domestic violence and the damage it does and that way something positive comes out of it. He could be going through a dark period; happened to Ozzy and Rick Springfield to name only two.
I too struggle to comprehend anyone lifting their hands to a woman or anyone for that matter, but it's a big crazy world and it's gonna happen.