It would be wrong to single out schizophrenics or anyone with a mental disorder.
In the case of Mr Russo, I don't think he should have his guns back.
* Mainly because of his recent actions. His conduct was so that his right to have a gun should be forfeited.
* I think he is potentially dangerous, and this is magnified due to his unwillingness to accept he has a disorder. His comment about 'taking only the smallest amount of medication' is not very reassuring. The article suggests the likelihood of him repeating this behaviour boils down to him taking meds or not. Therefore suggesting it is quite likely to reoccur.
* The use of guns by citizens should be for legitimate reasons such as hunting. I accept that 'self defence' is another logical reason. I hope 'threatening' people is not a legitimate use.
* Most people probably say stuff they don't mean when angered. However, threatening to shoot people, especially when the person making the threats has an armoury of 18 or more firearms should be taken seriously.
I am not going to pretend that I know anything about American laws, or your constitution. I find it a bit confusing when laws seem to differ from state to state. My POV is purely from an angle of 'would I like to live next door to Mr Russo when he gets his firearm stash returned?' No way.