If it's your intent to report facts about gun violence in Chicago, and only that, then dropping those other facts detracts from what you're doing. It makes it look like you're insinuating possible causes. Like that voting Democrat leads to gun violence, or that poverty causes gun violence, or that hispanics and blacks perpetrate gun violence.

By mentioning certain remotely related facts, it looks as if you're hinting at giving an interpretation of the central facts.

If you want to convey facts about a topic like gun violence in Chicago, then stick to facts closely relevant to it. Like different ways of slicing up the data. You might show a density map of where in Chicago most of it has happened over a certain period, or demographics about gun violence.

Now if you want to explore a link between gun violence and something else like poverty, then you have to get your ducks in a row about that. Such a subject deserves to be treated by a sophisticated researcher with an expert background in statistics. If that researcher postulates some kind of link, they have to look at all the reasons why that might be false, not only true.