Thanks for the advice, people ! I think that ,after control has broken-down like that , both sides must have expected (and their coaches didn't complain later ) about the reds. I felt that it sent a message to both sides to stop retaliation. There had been no foul-play or allegations of such until that point.
Just another thoughts, in the last 10 minutes of the match, would you tend to yellow more than red-card offences becasue (a) It achieves the goal of getting those players off the pitch and (b) means less paper-work for the reports afterwards ?
I'd love to see the stats on what minute of the match a red is issued versus a yellow. That would be interesting !