Soldato
It wasn't a good tackle. It was two footed and he's jumped into it. At worst (or best depending on which way you look at it) it was a yellow card.
I personally thought it was only worth a yellow because I didn't think he was out of control, used excessive force nor was the challenge particularly dangerous. However, despite the laws not specifying it, 2 footed tackles are nearly always punished with a red card.
Richards was hardly immense either. You were an absolute shambles at the back until HT, when you effectively went to 5 at the back, and Utd seemed to take their foot off the pedal.
Take Heed Biz, BaZ talks sense