that's why Tommy Robinson was arrested and put in jail.
Nope. He was jailed for Contempt of Court. It's the second time he's tried to disrupt a trial, by filming the defendants and witnesses at the court. That's illegal, as it can prejudice a trial, and force a retrial at a cost of £X00,000s. He was under a suspended sentence for doing the same thing last year, and narrowly escaped jail (i.e. he got leniency from the judge). But he did it again, so he was jailed.
I say again: the first time he did this, last year, he got leniency - no jail time. So it is hardly a case of the 'state' trying to silence him. If it was, he'd have been jailed first time.