Oh I fully understand your pruning down the deaths to just one on another murder, but what you are ignoring is the the fallacy of 'an armed society is a polite one'. The difference between highly restricted states and give everyone a 'gun' states is .02 per 100,000. (and quite frankly the variance between each year can shift that back and forth)
The argument isn't less 'guns' means less murders- that is the strawman you are attempting to deflect the discussion with- no Sir the argument is less 'guns' means less deaths.
Arming everyone or making the poor citizen 'helpless' with no firearms doesn't seem to make much of a difference between Texas or Illinois in criminal activity- gangs will fight over turf and drugs, but lax 'gun' regulations do seem to promote more 'gun' related deaths.
FYI I think it is a bit dishonest to exclude suicide- it is still killing someone who isn't harming anyone else and against the law.