Hmm, mob rule and "educating people why they are wrong" does one thing - it sends these people underground and it's why Trump might win again:
https://www.theguardian.com/us-news/2016/mar/03/secret-donal...
I'd rather have these ideas out in the open where people can defeat the arguments properly without ad-hominem, rather than shouting them down. And hell, maybe even learn something new.
The only way? How about reconsidering your own position and offering people something they would like better?
What if people like the police having free reign to assault and even commit murder arbitrarily because of false associations with, say, safety?