This is a harmful misunderstanding and mischaracterization of the phenomenon. Ordinary people are far more likely to get canceled than fascists because the cancelers don't hang out on fascist forums. They go after people who have slightly less "pure" opinions than their own in the regular communities they participate in. A classic example is the implosion of the knitting community - https://unherd.com/2020/01/cast-out-how-knitting-fell-into-a...

This problem predates the Internet and is a strong argument against mob violence as a form of protest. For example race riots in the US invariably occur in low income black neighborhoods, and the result is a bunch of black businesses get looted and destroyed. The mob is not capable of going to where the elite are and doing real damage to them so instead they trash their own neighbors and perpetuate the cycle of oppression. Similarly the cancelers tend to participate in communities that largely share their views and then destroy those communities over minor affronts.