The article title says "Bernie Sanders Rejects the Idea of a Permanent Ceasefire Between Israel and Hamas"
Israel was committing their genocide in full effect for months at that point. "Israel has the right to defend itself" is absolutely no excuse to oppose a permanent ceasefire. It was willful ignorance at best.
It is the opposite. People join an instance which does not agree with their point of view. They get banned. They move to a different instance.
Echo chamber galore.