If conditions cannot be guaranteed, the court can uphold his appeal and deny the order.
Whether or not that ruling would in turn be appealed by the US DoJ to the UK Supreme Court is moot. Ditto chance of success if it is. Between impinging on the right to freedom of expression & the horrors of the US penal system, extradition is likely illegal under UK human rights law.
Entirely different groups of people, and they’re profoundly opposed to each other.
At the core of this massive protest/strike are groups which have been against the bombardment of Gaza from the outset, and protesting Israel’s war against Palestinians for years.