I thought Luis probably should have only had a yellow card as well, so I googled the Law changes

Where a player commits an offence against an opponent within their own penalty area which denies an opponent an obvious goal-scoring opportunity and the referee awards a penalty kick, the offender is cautioned if the offence was an attempt to play the ball; in all other circumstances (e.g. holding, pulling, pushing, no possibility to play the ball etc.) the offending player must be sent off.
http://theifab.com/laws/chapter/32/section/94/

Blooming Ref got it right