Unless there is news about Facebook employees intentionally changing their algorithm to promote violence directly, none of these arguments feel genuine. We're past the point where we can compare the world with and without Faceboook, when a social media site becomes unavailable to a certain group they will go to an alternative, as seen with Parler. Facebook mining and profiting from harvesting political user data show…
Social media's aims are unlike any other social space to come before. Restaurants gather people together around delicious food and everyone is able to enjoy themselves at the table with a meal and friends. Friendly engagement. Parks invite people to have recreation at various stages in life, whether with team sports, a playground, just running around the grass, or a picnic. Friendly engagement. Public transit helps p…
Like and Dislikes are only as valuable as users allow them to be. A great counterexample to many of your arguments is the social media site we are discussing this topic on. The culture on Hacker News de-emphasizes Likes and Dislike. Comment karma is visible to the poster, but to a reader, a +100 karma comment is equal to a +4 karma comment with the only difference being what is seen first. I personally forget about that and end up reading comments to the end of threads I enjoy anyway.
I think letting such hostility build for the concept of social media is as damaging as any political extremism the censorship is supposed to combat. It feels like the extremism isn't gone, just redirected. Social media and the internet has changed who people interact with, not just how. In the past extreme ideas existed, but were tempered because of others around them. Social media has allowed people to choose to only listen to people with the same perspective, letting extreme ideas go uncontrolled. You can argue that it's the fault of the technology, but the main responsibility falls on the individuals.
Social media doesn't make people hateful, it makes it easier for hateful people to convince other to think like them. Bullies have existed long before social media and continue to exist in every context.