The articles that are posted in this thread are hardly the only such stories. From last month:
January 4 in Amarillo, Texas, two men broke into a house. When the homeowner confronted them (he was, after all, in his own home) first one and then both of the invaders began physically attacking him. The homeowner was armed with a handgun, and shot and killed both attackers.
January 15 in Kerrville, Texas, two men were arguing in a restaurant. One of the two pulled a knife and began stabbing the other man. Another customer was able to intervene after he retrieved a handgun, stopping the attack and holding the attacker at gunpoint until police arrive. Local police thanked the man with the gun for “his heroic actions to stop the assault”.
January 22, in Orlando, Florida, a young woman was attacked by her boyfriend, who began physically battering her. When her parents attempted to intervene, the boyfriend then began attacking the mother as well. The young woman’s father fired a “warning shot”*, then fired again, critically injuring the attacker.
*“Warning shots” are often considered to be a bad idea. They are certainly dangerous. You are responsible for any bullets that come out of your gun, regardless of your intention in firing them. In this case the “warning shot” did apparently go into the ground, and did not ricochet and injure any innocent person.
January 25 in Harrison Township, Michigan, a man violently broke into his ex-girlfriend’s home. This happened in the middle of the day, and there doesn’t seem to be any question but that the man was attempting to violently assault the woman who lived there; reportedly this was also not the first time police had been called about this particular ex-couple. Another man shot and killed the attacker with a handgun.
January 27 in Seattle, Washington, a man was walking down the street on a Sunday morning (about 9 a.m.) when another man approached him and began punching him in the head and chest. The victim drew his handgun and shot and wounded the assailant. The attacker was later arrested. It doesn’t appear that the victim and his attacker knew each other.
January 28 in Willard, Missouri, a man broke into a house around 4 a.m. and attacked the homeowner (there were also at least two other people living in at the house at the time). The homeowner shot and killed the intruder. (Note that the article is a little unclear on what happened; the lead sentence says the homeowner “shot and killed a suspect in a home invasion” but a later paragraph says that local sheriff’s deputies “said the homeowner killed the man in a struggle, but have not said how the man was killed”. I don’t know if that’s a contradiction, or just a question of the article having multiple sources.)
You could classify all of these events as stories of “gun violence”–in each case, there was violence, and there was a gun, and the gun was used, and in several of these cases guns were even used to kill people. In each of these cases, though, the “violence” was really being perpetrated by a person or people who didn’t have guns, and the people with the guns were defending themselves against the “violence”.