The nagging suspicion in their deepest subconscious that one night somebody, somewhere is going to stick double figures past Celtic in a mortifying moment that will live on in infamy.
Throughout this season Keevins has been predicting the downfall of Rodgers and Celtic. If there was a negative angle to be found on anything Celtic related the veteran hack projected it forward to the next match and the consequences of defeat.
But character assassination and abuse from his own fans, and others from outwith the football-related media, is another matter. Rodgers can mull that over while addressing if his team have what it takes to overtake Rangers in the league.
Behind them, in the away end of the ground, some Rangers fans sang a song about Boyle that was an affront to human decency.
Since the summer of 2016 with his old buddie Derek Johnstone, Keevins has been drooling over title success at Ibrox, even tipping Mark Warburton to put Brendan Rodgers in his place.
It was classic Keevins yesterday but there was still a couple of minutes left to play, most observers of the Scottish game know that only a complete fool would write off Celtic while there is still time on the clock.