I get what you are saying, but other demonstrations don't include people openly singing about 'Fen***s' and the UVF on the streets, which to me is quite blatant criminal behaviour as much as it would be if it were racist or homophobic slurs.
Treating each demonstration/march (Orange Walks/Scottish Independence Marches/Anti-War Rallies/Pride etc) on it's own merit, there is a clear sinister element to Orange Walks that is simply not in evidence at the others. Banning it is a no-brainer for me.