It's called The Benghazi Line: if they've collectively caused more deaths (5) than occurred during the Benghazi Incident (4), then they're a legit threat requiring action to disrupt and deplatform.

With less snark: it's not about how much organization they demonstrate, it's a judgement call about the likelihood of tangible damage and destruction occurring. Yes, it's an imprecise standard. That's the reality in which we live and operate.