Graeme Souness had branded Celtic “the unacceptable face of football in Scotland” following the anti-monarch actions of a section of their support.
The former Rangers boss also believes the controversy will put off potential sponsors.
Souness hit out at the Hoops fans who chanted “if you hate the Royal Family clap your hands” and unveiled banners with the same message during a minute’s applause for Her Majesty before Sunday’s Scottish Premiership defeat to St Mirren, reports the Daily Record.
