Stuart McCall insists Rangers' alleged party goers must be "thickest people on the planet" if they've breached Covid rules.
The Ibrox club have launched an internal investigation after claims some players attended a gathering following Saturday's win over Kilmarnock.
The allegations have not been verified but former Rangers midfielder and boss McCall is dismayed after Scottish football earned another public rebuke from First Minister Nicola Sturgeon.
It follows a previous incident at the club where Jordan Jones and George Edmundson were fined and banned for attending a party, with both now shipped out on-loan.
And McCall told BBC Sportsound: "I'm absolutely astounded, especially because it's happened not so long ago with two Rangers players.
"So, you can imagine the meetings they've had at the football club, Steven Gerrard and everyone throughout the club, knowing the rules, we all know the rules.
"You saw the punishments the other two lads have had, you've got a European game coming up on Thursday, you've got a chance to go and win a title.
"Honestly, they must be the thickest people on the planet because it defies sense, doesn't it? Common sense.
"I'm sure every Rangers supporter will feel let down and also Steven Gerrard as much as anyone.
"You're disrespecting him and the football club by going and breaking the rules that could hurt your football club.
"It's crazy."
