Tommy Robinson

I suggest before automatically dismissing the man that you take the time to listen to his speech to the Oxford Union. This speech is why he has attracted so many signatures in support of a petition to free him(579000)

Oxford Union Speech

You may wish to judge the man by his mainstream media depiction. That is your choice.
His arrest is in reality to silence him, because he is publicising facts that the government is reluctant to publicly acknowledge. That in essence is what the modern Tommy Robinson is about - not his freely admitted, loutish past. Study footage of his many arrests and discover just how flimsy the pretexts were. Then come back here and see if your outrage has changed.