DonDiego did not present "the data." He presented SOME of the data--that which supported his implied contention.
In any event, he should read my post about the difference between correlation and causation.
He should also drop his obession with Chicago.
He should also stop trying to politicize this discussion with his implied premise that Democrats cause gun violence (he should read my post about correlation and causation).
He should perhaps provide his input on the aspect of the issue that I have repeatedly requested that members of this forum discuss, rather than bringing up NRA/Republican talking points: gun violence in the home.
DonDiego looks forward to an explanation of what he terms "the co-incidence." (It shouldn't be hyphenated, but whatever.) In my post re correlation vs. causation, I posited one possible explanation. Let me restate:
1. Large cities have higher rates of gun violence.
2. Large cities tend to vote and be "run by" (I'll accept that dubious term) Democrats.
3. Large cities usually have one or more professional sports teams.
4. Large cities tend to have more Chinese restaurants than other areas.
Now, any relationships between any of these premises would be correlational only. There may, in fact, be causal factors in those relationships. For instance, it might be possible that Chinese restaurants cause gun violence. But that would have to be proved, through one of a number of methods used in scientific inquiry.
In other words, it isn't enough to a) find a city that has a high rate of gun violence, b) find that it has a Democratic mayor/city council, and c) say AHA!!!!! You need some proof of causation.
Or we could solve the problem of gun violence by shutting down all the Chinese restaurants.
Here's another thought for you: find major cities that changed from a Democratic to a Republican administration, or vice versa. See if, a year after the change, gun violence rates had significantly changed. If so, you would still be only identifying a correlation, but it would be food for thought.