They aren’t that dumb. No guns means no resistance to tyranny. Crime is irrelevant. They want a country “where only the police and military are armed” according to Atlanta’s own home grown tub of feces, the late and unlamented former mayor of Atlanta, Maynard Jackson. That has worked out so well in the past with concentration camps, gulags, killing fields, etc. however Democrats don’t see that as a negative. They see the unlimited power government has over the citizens and become aroused at the thought of having their every whim enforced by the police at the point of a gun. They are NOT stupid. They are evil.
“... Democrats don’t see that as a negative...” They also misunderstand that a LOT of them will be right there with those they think deserve to be rounded up.