This isn't how social change happens. The extremes stay planted. They define the Overton window. The centre is the bulk that moves. It's the part that decides. The extremes effect change by persuading the centre, not by talking to other extremists.

This is the problem with partisan-fueled premature dichotomization. It creates lots of immovable people. The only solution to that system is to punt the problem for a generation in the hope that more people drift to the centre.