It’s a bit of a dilemma. If you leave, you’ll also leave Twitter’s (still large) userbase to freely be manipulated by the far-right without any objections. If you stay, you support a network owned and controlled by a fascist. By continuing to provide content you encourage other people to stay on the platform. I’m personally in favor of everyone leaving, but I understand why some organizations don’t. The least they should do is establish a presence on other networks so nobody has to use Twitter to see their content though.