Yes my point was we don't know why he gave the red. The options are a) linesman b) he saw the extent of the injury c) he had the yellow card knocked out of his hand and so instead of picking it up went for the red because it was less effort.
Personally I think it was b) but like I say I doubt he...
It wasn't a red card, it was good tackle which resulted in nasty injury. The ref was going to give a yellow but then was persuaded otherwise but we'll probably never know why. The end. Or is it?