I don’t believe most of the studies about guns and violence. The people doing them are almost always ideologically motivated. (Including the “guns reduce crime” studies.) If you look at the details, you find them counting suicides as “gun violence” to boost their stats. Your second link makes that “mistake”. Another common mistake is to ignore all confounders. Yes people who own guns might be more likely to be murdered. Perhaps they own guns precisely because their fears are justified. Lastly, studies almost always conflate legal and illegal gun ownership. There is a huge difference in risk between a law abiding citizen who gets a concealed carry permit and a gang member who illegally carries.
The sad truth is that nobody is doing good research on this topic. Moreover, studies like these are barking up the wrong tree. I’m certain that restricting some rights would lead to improved outcomes, but that doesn’t mean we should restrict freedom of speech or voting. So too for the right to defend oneself from violent criminals.