IIUC, the idea is that the whole thing was a setup from start to finish:
1. Burisma emails were hacked;
2. Hunter Biden's iCloud account was hacked;
3. They bought a Mac, dumped a bunch of the hacked photos, along with some real hacked emails and some forged ones;
4. Sent someone over to the computer shop with the frame up on the laptop already in place;
5. Either the store owner was complicit from the beginning, or they just used him as a dupe.
The above may or may not be true. But again, IIUC that's the line that Twitter is taking.
If that's what Twitter believe (or can credibly claim to believe), then they're executing the policies in their TOS.
I'm not saying it's true, and I'm not saying it ain't. That's just my understanding of Twitter's stand on this.