What are you basing that on? The word extremist is there for a reason, people spam and try to overwhelm any site without some bare minimum of moderation. Even sites that say they are going to be all about "free speech" end up immediately having to come up with a plan to weed out all sorts of horrible stuff. Voat, 4chan, 8chan, parler, zero hedge, slashdot with the filter score on minimum... How many examples do you need that are the opposite of your prediction.
Extremists don't want discussion, they want to blast something outrageous to as many people as possible, it is directly opposed to what you think will happen.
Extremists don't want discussion, they want to blast something outrageous to as many people as possible, it is directly opposed to what you think will happen.