First sentence response: In places like Chicago and gun free zones, yes. The rest of the country, no, I don't agree in the slightest
Second sentence response: We already have many rules and regulations on guns and gun registration. More of it simply won't work. Again, I point to places like Chicago and other gun free zone cities where there's gang violence weekly.
Third sentence response: Uh, the Democrat candidates want to "buy back" our guns. They're on record with this. So they're wouldn't be ANY need for paperwork if we can't purchase them.
Final sentence response: No, pro gun people are not even involved with the shootings. Which brings me to the meat of this subject.
You are not going to fix this problem with new piece of legislation that limits or prohibits people from buying firearms. The problem with these mass killings ALL start at home. The number one factor is the family is broken. Typically there's no dad nor a father figure to help guide these kids. Mothers will do their best to raise them on their own without another man's assistance, but the main role for a mom is nurturing and caring. A father's role is discipline and confidence, and the dad compliments the mother in where she's lacking, he reinforces that area, and vice versa. There MUST be 2 parents, one male father and one female mother, to raise a child. However, society has shunned, demonized, and made villains out of ALL men, and many women that are fed this filth buy this rhetoric. Does that mean all men are good? No, but that doesn't mean we lump the good ones in with the bad. Unfortunately, you have these feminazis who run around and play on women's emotions just enough to get them on their side. When that happens, you cut off the other half of what it takes to raise a child properly. Especially if the child is a boy, and, let's face it, the mom isn't going to know how to teach a boy on how to be a man because that person never was a man. Pretty simple. Without that confidence and discipline of a father figure, biological or not, that child's mind will be warped. They may be raised in a certain way where they get picked on, bullied, laughed at for being an outcast.
The guy who shot up the Florida school over a year ago is a good example. Broken home, mental and social problems, and he was bullied. Which brings up another point, do you wonder why these shooters shoot up schools? It's easy to say that they're the easiest targets and they know what school procedures are in the case of a shooting, which both are true, but that's not the reason. The real reason is they're going in to blow whoever had been bullying or demeaning them away. It's typically bullies and teachers. Whoever it is, in these shooters' minds, it's payback time. You could say the same thing about the gang violence in Chicago. Although, there are many casings where attackers may not have access to a gun. Instead, they'll get knives and use those. Mass stabbings is a thing, especially in the UK. Cars have been used. Bombs. Whatever the person can get a hold of to cause death with, they'll use it.
Guns are not even at the very top of what's killing people. They're no where near it. Some of the top causes of death are caused by health problems, car accidents, smoking too much, drinking too much, overdosing on drugs and pot/marijuana. Things that can be avoided if people took better care of themselves. So more gun registration and laws will not solve or even reduce the amount of mass deaths in our country. Overall, this question of saying pro-gun people is overused and EXTREMELY stupid because you should know better. This partisan politics that you presented, plain and simple. And that's why it's better that a more proper and real reason is the cause of these events.