I would have to agree, there is nothing wrong with a healthy dose of licensing / control to keep criminals and the insane away from firearms. However this control would have to be inplemented in such a way that it is made as foolproof as possible.
In the Netherlands control over the law abiding portion of gunowners is as tight as it gets,.. while, with the EU's outside and inner borders as leaky as they come, criminals can get their hands on any firearm they desire.
Extremely ineffective policing and law enforcement also mean that in the Netherlands, criminals can use their weapons with, near, impunity, while hunters and legal shooters are scrutinized.
As mentioned by Pzgr40, there are multiple cases of firearms related violence in the Netherlands on a daily basis, it even gets so bad as handgrenades being used. Oftentimes they are merely tied to doors or left on porches as a threat (to get rid of competing "businesses", or in order to extort "protection fees"), but in the neighbourhood where I used to live until last April (western part of Amsterdam) no less than four handgrenades were used "in anger" since november last year.
So unless enforcement is thight "all the way" ... a ban on firearms will not solve the problem of firearms related violence....or worse.