alt Hacker NewsThe US has a three part test[1] for what constitutes incitement:
- intent
- imminence
- likelihood
If the UK had speech protections like the US (which I wish they would) then it would fail the imminence and probably the likelihood tests (you rightly note that it is ineffective).
These tweets had 33 views. At least before being made a charge.
I think that puts the likelihood-factor at zero.