If its proven that someone is being racist then you should be allowed to go into them studs showing. Not just in football that counts for everything. Carry your boots everywhere with you.
We had an incident about 3 or 4 weeks ago with the team I play for/manage.
The other team were beating us 3-0 at the time and one of our players was doing the line and flagged that the ball had gone out for a goal kick. Their players didn't like it and one of them released a barrage of racist abuse at him. He dropped the flag and walked off (fair enough) well a few of us tried to explain to the ref what had happened.
The ref did nothing at the time and was laughing when he said 'shall we get on with the game now lads'. Afterwards I think he realised he fucked up and he came into the changing rooms and asked us to report it to the league. As it happened he reported it to the league before we did, and we're now going through the process of filing a complaint.
You really do get some nasty twats playing football, and this is Saturday league level too. I hope they through the book at him and his team.