The Big Brother star was celebrating her 29th Birthday in her native Bristol, when the gang approached her brother Harry asking for directions.
When he started to respond in sign language, the men lashed out at him.
Josie, who is known for her weight loss dvds, tweeted a picture of Harry’s shocking injuries, angrily writing:
'What a disgusting world we live in'
'Lost all faith in mankind tonight. I went to the toilet and my brother got beaten up for being deaf.
'What a disgusting world we live in,' she tweeted.
'I'm going to hunt the bullies who did this! The nicest guy ever was beaten up because they thought he was deaf & dumb.'
Harry was left deaf after being struck by meningitis as a baby.
A spokesman from Avon and Somerset Police confirmed they were aware of the incident.