The difference is that people who support Trump can't be punished like this precisely because there are so many of them. This kind of social shunning doesn't make sense when 43% of the population would need to be shunned. Shunning people creates exactly the kind of political environment where a dangerous minority like this can continue to exist. When people are angry, they want to be heard. If you deny Trump supporters the chance to be heard, they will stay angry (or worse).