Every club has idiots in their fanbase, and these idots will act up if there is an excuse to. Lowe and Wilde are a convenient excuse for this. Anything inflammatory during bad times will set them off.
I would conclude on that basis that it is due to Lowe and Wilde continuing on that the extra 60k for policing is required, saying it's just due to the thugs is rediculous, some policing is required in the first place to counteract them anyway!