You summarized it quite well and I think the threat from Galatasaray is bigger than some might think at the moment. The problem is not that Manchester United lost one game against Galatasaray, the problem is that they lost their home game against Galatasaray and for everybody who thinks that nothing is lost yet and Manchester United just has to show some quality and beat them in the game in Istanbul, those games are like hell with the Galatasaray fans backing their team. For Manchester United I think the game against Galatasaray will be no easier than the game against Bayern when they played in Munich. The atmosphere and then also the quality that Galatasaray has at the moment both makes me believe that Manchester United will not win that game. And if they don't win it I think they can't qualify for the next round in the Champions League.
before the group phase started, most of the people here said that Galatasaray would not be able to appear strong in the group phase and I also said that the team would not be able to compete with other european teams such as Man United etc. but the fact is that it is not as previously thought that Galatasaray can become a strong challenger to Bayern Munich because from group A the only ones who appear unbeaten are Munich and Galatasaray. this is very worrying if it can surprisingly shift Bayern Munich ranking even though it is impossible I always remember there are surprises in every match so I admit that Galatasaray cannot be underestimated if this team is one of the strong teams in Group A and Bayern Munich must be careful with this team.