Well, you still propose an individualistic approach - a personal appeal to individual tastes - and dismiss my suggestion that we should concentrate on institution building as "big generalization."
To make my point clear - ideas are like food, you like what you are familiar with. People who not exposed to, say, Ethiopian food, are unlikely to like it - no matter how much you try to persuade them. To make them like it, you need to introduce a bunch of restaurants serving the Ethiopian cuisine to the area.
Ditto for political views and opinions. The left is not institutionally represented in this country in any commonly recognizable form (fringe campus groups are NOT legitimate public institutions), hence the US public has no taste for left views and opinions. The only way to change it is to build "left food restaurants" - legitimate public institutions (such as political parties and unions) representing the left point of view.
wojtek