It's worth noting that the average sentence for murder in the US is 15 years. And it is not actually a "designated terrorist organization". The government is claiming they are a "domestic terrorist organization" which isnt a thing under US law, additionally, there is no organization to speak of.
The important thing to note here, is because it's not a real organization, but treated like one, they can simply tie anyone against the admin to a "designated terrorist organization" and put them away for decades with little evidence. As they did here.
> And it is not actually a "designated terrorist organization".
It is.[1] Perhaps you mean it's not a statutory Foreign Terrorist Organization, like Al-Qaida or Hamas. That is a harsher designation, but that's not possible for Antifa because it's not foreign.