"Abuse jacketing" is extremely harmful rhetoric packaged in vaguely leftist-sounding terms (a common abuse tactic is to co opt whatever socially acceptable terminology might make it sound convincing). Even if this person knew for certain there had been no abuse, you can tell a lot about someone, and about whether they care about abuse, by how they respond to claims they disagree with. By responding so aggressively, saying anything it takes to get their way, they just make it even harder for more victims to come forward, showing survivors they'll be met with hostility, and set a precedent of tearing down survivors you disagree with or don't like. Even if we 100% know a claim is false, it's extremely important to be mindful of how we communicate this so as not to harm survivors and perpetuate a culture of abuse