We have a very big fan-base, and he'll have also have had thousands of tweets wishing him well (including mine). Celtic fans to this day still love him and we were all cheering him on to win the FA Cup with you guys as we want him to have a successful career. I agree that the anger and the threats don't make sense and I'd never grudge a player moving on to what is undoubtedly a much higher standard of league (we'll avoid comparing sizes..) But you can look back on my posts here from when I was posting prior to his signing to see that throughout the whole thing I (who I think am fairly reflective of most Celtic fans, I'm a member of a few Celtic forums) was nothing but respectful.
I don't condone the threats, or the defacing of property which took place when he left, but I don't think it's reflective of the majority of Celtic supporters. But as you're specifically asking why some fans reacted like that, this is my understanding of where they're coming from:
I think what's hard to understand for people not from Glasgow is that a lot of fans come from a lower-working class background and for many the football and successes of Celtic are in many ways their only escape from an otherwise tough slog in their day-to-day lives. The East End of Glasgow has areas which are among the most deprived in Europe, for context. A lot of these people will have substance abuse problems be that drugs, alcohol, or both.
For guys like that Celtic is more than just their football club, it's their religion and a way of life. These are the guys who It's absolutely inconceivable to guys like that for a home-grown player who lives and breathes Celtic like Tierney does to even consider leaving. They projected themselves onto him, he was living the dream of each and every one of them in having grown up supporting the club and giving everything he had for the jersey, they expected him to stay for his career and captain the club, no matter how unrealistic that was. When he left, it shattered that, and they lashed out.
I don't think, a year on from him leaving, most of those people grudge him it anymore - we invested the money well to strengthen the squad and he's already won a trophy so it ended up benefitting everyone. There will obviously be a few fans who will never let it go, but they'll be a very small number.
Probably doesn't help that these fans all saw videos of him as a youth team player as it just fed into their belief:
and he also featured in a Japanese documentary about Shunsuke Nakamura, 5 minutes into this video:
Last edited: Aug 19, 2020