Where does support or opposition turn into mobilization?

Every dot is a person. X axis = how much a person supports the issue; Y axis = how much it moves their vote. The upper left is outlined as the "backlash" corner. The boxes are shaded where more people fell.

Source: national surveys of US adults, weighted to Census benchmarks. Both scales 0–100. Dots are a random weighted sample of respondents (jittered slightly so identical answers don't overlap); shading is the full weighted density.