Well lets take the darling of the flag-waving patriots, Tommy Robinson.
He is a known and convicted football hooligan, in fact his pseudonyms were to evade football banning orders and travel bans because he was convicted of assaulting a police officer in 2004. This didn’t stop him going back and committing further offences, politically motivated, for which he also has convictions:
All of this has not stopped showing support for similarly minded thugs: