Here is the FBI's Homicide data by weapon type
for the years 2014 to 2018. In 2017 you'll notice there were 7.061 homicide committed with a handgun. In the same year there were 390 homicides committed with a rifle and 3,121 committed weapon type not specified. The latter number is probably broken down at approximately the same ratio but even if you want to generous, there are far more homicides committed with a handgun. So why the push to ban "assault rifles?"
"Your" pretty little chart leaves out the number of victims per incident, as well as type of victim... really the entire w/w/w/w/w/h...all of which is relevant to any discussion of gun control.
For example: Based on "your" chart there were 390 homicides committed with a rifle a in 2017. Interestingly enough, there were something like 346 "mass shootings" incidents in 2017 most of which involved a rifle, not all of which involved deaths. (Some people put the number of incidents as low as 10 as compared to the number of deaths as much as 628)...
The problem being details (facts) and definitions... depending on which details (facts) "you" include and which definitions "you" use, the statistically presented picture can change drastically.