Gun control won't stop ALL criminals but it sure as hell puts a demonstrably huge dent in criminals getting guns. There's so much regulation out there making it nigh impossible to regulate guns that it's having the reverse effect allowing all sorts of criminals to get guns. People tend to forget this is a big industry that uses fear and divisive tactics in order to make a killing (literally and figuratively).
I like and own guns but had no problem having them registered when I bought them. I've got nothing to hide. It's the most dangerous product out there and needs regulation.
All the best,
Nonoise