Chris Sutton has backed up the views of a large section of the dismayed Celtic support.
There were audible boos at full-time as the champions dropped points for the fourth time on home soil this season at the weekend.
David Watson's dramatic late header secured a well-deserved point for Kilmarnock as Brendan Rodgers' men crumbled under pressure.
This allowed Rangers to take the initiative in the Premiership title race, which they gladly accepted with a 3-0 victory over St Johnstone on Sunday.
The Hoops faithful have understandably been angered with what they have witnessed from their team in recent months.
And while the likes of English pundit Robbie Savage believe it's over the top, Sutton insists anyone who doesn't get their frustrations doesn't understand Scottish football.
Sutton told BBC 5 Live said: "There's a lot of unhappiness among the fanbase about Celtic not spending a huge amount of money, but my point is Brendan Rodgers should be doing better domestically than he is at this moment in time with the players he has available."
It was at this point that Savage interrupted, highlighting the fact that Celtic had been top all season up until this point.
But Sutton wasn't having any of it. He retorted: "They've been papering over the cracks with their performances. You don't quite understand Scottish football, second is last. You can't be behind in Glasgow.
"There are Celtic fans out there now who think they can't possibly win the league. I don't necessarily agree with that because there's a long way to go.
READ MORE: Ally McCoist 'dancing in streets' as Rangers topple Celtic
"This season, Celtic have dropped so many points domestically. What would worry me about yesterday is that Kilmarnock had more shots than Celtic in their own backyard.
"There's not a fear factor anymore when teams domestic teams play Celtic. They don't fear them, they fancy their chances.
"People can phone in and tell me if I'm wrong, but I don't remember the last time that happened. You look at periods this season, away to Aberdeen, away to Hibs, Kilmarnock second half.
"Teams are playing Celtic off the park. That is the worry and that, domestically, falls on the manager."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereLast Updated:
Report this comment Cancel