Er, you clearly do not remember/are too young to know about the Scottish behaviour at England v Scotland matches in the 70s at Wembley. Just find it on YouTube. They actually had to stop this annual fixture due to the drunken and loutish antics of the Scottish fans.
Which is why Scotland brought in laws to curb this sort of behaviour from 50 years ago. The Tartan Army is now a self-policing group which prides itself on partying, fundraising for charity and having a good time with opposing fans. Have you not read the papers or watched the news for 50 years?! 😂 Incidentally, one reason Scotland football fans behave themselves is to distance themselves from the English ones.
I once had to take a group of German senior police officers to meetings with the senior officers in charge of the divisions where Celtic Park and Ibrox are as well as with the heads of security at Celtic and Rangers; the German police wanted to learn from their Scottish colleagues how they had turned around the horrendous football violence of the past. One reason was the policing as well as the attitude. Here in Scotland, the clubs turn the stadium over to the police before the game starts and the match commander has ultimate authority, even to stopping the game. Fans are rigorously kept apart even after they get on their transport and the BTP are well organised. It's interesting that the only major problems with fans are Rangers and Celtic, and the last time there was major trouble was Rangers in Manchester where there wasn't the same policing and it was roundly condemned all round here. However, Rangers do have a problem with bigoted sectarian right wing idiots, as shown in George Square following the referendum. The courts do come down hard on football related violence, as do the clubs; anyone causing trouble will be barred, as with international games.
It requires a willingness to work together from the government, the courts, the police, the clubs, the licencees and the fans in order to turn around football violence. Luckily in Scotland all were on board to turn it around and football games are family-friendly activities with the police rapidly clamping down on trouble away from the grounds.
Incidentally, my mother was in Aberdeen the night the Dons won the European Cup Winners' Cup and although there was loud partying, at no time did she feel unsafe and there was no damage. In addition, the club hired a ferry to take fans to and from Gothenburg, and the company noted that not even a light bulb was broken despite the partying.
But continue with your ignorance about the present day and continue living in the past and bringing up old history to justify your contemporary thugs.