Because you live in Chicago, where criminals have run everything for close to 100 years and if they want to have all of the power, nobody else can be allowed to have any power. Governments that want to take away guns are only interested in controlling people. Gun control places the vast majority under the thumb of the government and they assume the non-law abiding won't live by the laws. They know that if people register their guns, they will be controlling roughly 90% pf the population. You may have noticed that third world countries often have next to no education for their people and offer almost no services for them. That's because an uneducated populace is more controllable than a well educated populace. Throwing these people an occasional bone makes them depend on the government and when that happens, the government has the people right where they want them.
They may know it, but they don't seem to acknowledge that criminals don't buy guns at gun stores, following the rules the rest of us are required to. They go to a bar, call someone who "knows a guy", have someone buy it for them (straw buyers are a big problem here, at one gun dealer) or buy them as parts, which aren't usually regulated.
Your comment places gun control in the same realm as the war on drugs- gun control is still a state/local issue and the other is national, falling under the Federal government's umbrella. If gun control is ever mandated federally, it's gonna get ugly, in a hurry.