The chaotic post-match scenes at the Uefa Cup final in Manchester must be utterly galling for those thousands of Rangers fans who follow their team with pride and distinction, yet who must wonder how on earth their club is to be rid of the social poison at its core.

These recurring incidents of delinquent behaviour with Rangers fans on the road are becoming tedious as well as depressing for those of us who chronicle this football club's fortunes. It doesn't seem to matter what Rangers as a club try to do - and the Ibrox board have explored every conceivable road recently - they simply cannot gouge out the primitive element among their followers.

By sheer chance a colleague and I stumbled upon the clashes between Rangers fans and the riot-police around midnight in the centre of Manchester on Wednesday night. Earlier, in the media centre, we had received reports of a Zenit fan being stabbed, and of a number of Rangers supporters being apprehended over that incident, but what we found in the centre of town was something else entirely.

Three of us had gone back to a hotel to pick up some luggage and, one block away, the clashes between fans and the police were in full spate. We drove into a grid of wailing sirens. One Rangers supporter said to me: "It's like a war-zone down there. Some windows have been kicked in and there's fighting with the police." One colleague went off to pick up his bag and returned 10 minutes later, slightly shaken after having to pick his way around the chaos.

The experience earlier in the day in Manchester on Wednesday was also depressing. The blight of bigotry has haunted Rangers FC and, while the club has pleaded and pleaded with fans to stop singing their sectarian dirges, the evidence of Manchester city centre over that period suggested they have made little progress in winning this battle. A range of songs which bellow about "Fenian bastards" and "F*** the Pope" remain the routine chant of too many Rangers supporters. You couldn't walk 50 yards in Manchester city centre without being assaulted by one such chorus.

This is a sensitive subject for Rangers. The club has begged Scottish reporters and editors to play it all down, because it "harms the image" of Glasgow and Scotland. Rangers themselves have hired a PR agency over the last two years, asked to perform what is euphemistically called "damage limitation" when it comes to these repeated embarrassments for the club. The PR boys have a tough job.

As a club Rangers are very familiar now with having to issue declamatory statements in the aftermath of such scenes as Manchester. A recurring phrase - and it was used again by Rangers yesterday - is that it is "a small minority" which ruins it for the rest.

The problem for Rangers is, this isn't a small minority of fans at all, but a large minority of them which indulges in such drunken, or aggressive, or bigoted behaviour. It is an on-going blight upon a very proud and distinguished Scottish institution.