Having once been a blindly pro-gun-control Democrat, I can tell you that, at least as far as we rank-and-file peons were concerned, gun control was never about clearing the way for our "agenda".
Statist Liberalism is fundamentally cursed by its inability to trust people to make decisions, and to differentiate among types of citizens. Liberals refuse to believe that there is a criminal class, and yet there is so much crime. Confronting criminality along its true demographics would place liberals in the position of being "racists", so they have to confront other aspects of crime that are not protected classes of people. This, coupled with the liberals' classic disregard for human agency, creates a situation in which it is simply easier to target the means of crime, rather than the tough, un-PC human factors such as parenting and culture.
We city folk are used to expecting the mayor's office to solve everything that plagues us. Urban individuals, as shown in numerous sociological studies and incidents, display a shocking lack of responsibility to the problems around them. Remember Kitty Genovese? Have you ever seen those experiments where they place a fake stricken man on the sidewalk? Rural Americans pounce on him to offer aid, while New Yorkers stroll right past him for HOURS.
This diffusion of responsibility, naturally, bleeds into the arena of self defense. Individuals believe society is responsible, since society takes care of every other essential function. Thus, someone who wishes to take responsibility themselves is seen as anti-social. Also, when people see privately owned guns, they are painfully reminded that such objects are needed, and therefore, that the dangers really exist. This is uncomfortable, and the mind does amazing things to reduce that discomfort.
And keep one thing in mind: Since 1968, the populist, fair-shake-for-the-working-man Democratic Party Leadership has been extinct, replaced by the leaders of the Peace Movement. Pacifists are known for their total inability to differentiate between predatory and protective violence. When all violence is evil, then all means of violence are evil as well.
Just one former gun bigot's opinion...