Isolating fringe radicals who explicitly aim to topple democratic systems is vastly preferable, in my opinion, to the actions of those fringe radicals to intimidate voters, threaten elected officials and poll workers with violence, and openly foment civil war that could bring untold misery to millions. It's not all that different from how the lectures of Anwar al-Awlaki were removed from YouTube back in 2017. Not every idea, no matter how pernicious, needs to be given room to flourish.