Since the victims have very little trust[1] in the ability of the judicial system to handle this properly, the question about whether what Jacob did is legal or not is entirely unimportant. What matters is if there are victims who are hurt in more than just "their feelings". Given the number of credible people who have voiced concerns, and given that most of them also think that Jacob should get help, not go to jail, it seems very safe to believe the victims. The alleged damage done to them outweighs the possible damage that Jacob could face for being falsely accused by so many people.
Anyway, it's not like Jacob has any shortage of advocates in the public. He's charismatic, smart, likable. He'll be able to surround himself with supporters far more easily than his vulnerable victims can.
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[1] Very justifiably, as recent high-profile cases like Brock Turner or Jian Ghomeshi demonstrate.