Isolating these people and making them feel lesser for the way they act is the only way for them to change
None of the people who spout vile shit on the internet like this have any ounce of remorse for the things they say, or respect for basically anyone. Treating them with decency and trying to "be the bigger person" just reinforces that they have no social consequences and it's not that serious to them
The only way to get to any of these pieces of shit with zero empathy is to totally socially ostracise them and make them feel like their beliefs genuinely make them lesser as a person (which they do) because personal consequence is the only way to reach them.
Chuds like this don't want to change whatsoever, the only way to force it is just making them complete social outcasts