Again, you are just guessing. If you are claiming that over the years there haven't been diehard fans who got drunk and into a punch-up, then you have been turning a blind eye. It happens at every club. There is no need to try and make excuses that they aren't 'real' fans. Clubs do have real fans that also cause trouble, and that's the major reason booze was banned from the grounds.
So let's not get bogged down in semantics. It was Motherwell fans who caused the problem, now it's up to the rest of us (and the club) to make sure they are dealt with. By the sound of it, that's exactly what is happening.