You're wrong, I don't know how else to put it across to you. The number of home supporters on seats for these games are always lower than games Vs any other team. They (old firm) are the opposite of an "attraction". I'm not sure how Kilmarnock (or other clubs) for that matter count official attendances - IE is it tickets sold which include every season ticket holder whether in attendance or not? Or is it every person through the turnstiles that day (more accurate)? I know various clubs report differently, I'm not sure.
What I am sure about, having had a season ticket for about 25 years of my life, is that our crowd is way down for these fixtures as people choose to stay away. There's much more empty seats than what's present for all other league home matches.
There was a period during the Michael Johnston chairman era (who loved to bend over backwards for the old firm) that home support was regularly under 2,000 people. I don't mean that in a hyperbolic way, the home stands were genuinely as empty as I've ever seen them.
Sometimes it's maybe better just to take my word for it. I go every week, I see it for myself. There will be various factors at play with how official numbers are counted as said above but it's down. A home tie against hearts, st Mirren, Ross county or whoever will see more home supporters in attendance than if we were playing any of the old firm.
As for the red card again, I fully agree with
@MadchesterCity post that it's 50/50. Which is why I've said it shouldn't have been for VAR to get involved as there wasn't a clear and obvious error from the referees initial decision of yellow. If his initial decision had been red, again I wouldn't have expected it to be reviewed and downgraded either. My personal opinion is that yellow was fine, however that's the only one of our 3 red cards this season where I disagree with the officials - the other 2 have been fully merited.
If we've appealed it I think we'll lose.