Follow Follow (Song) - Question

[Batigol]

I've often wondered when hearing the line "Celtic know all about their troubles" in FF. Not sure exactly when we started singing the song, but is this line a long forgotten reference to anything specific or just a general dig at them?

 

[BSPECIAL]

Just letting them know they were inferior are inferior and always will be inferior.

 

[Broxmeister]

I don't actually know the answer but it's very apt wording for the present is it not.