Ramires received his marching orders in the 85th minute for a challenge with studs showing on Mario Gotze, which prompted the referee to produce a second yellow card.
Mourinho thinks that the Brazilian midfielder deserved the benefit of the doubt, questioning whether the official loves football by not allowing the match to stay at 11-a-side, despite the reckless nature of the tackle.
He told ITV Sport: "I prefer to say no, even if you say yes. Because for me rules are rules but there is a very important rule which is common sense, passion for the game.
"The referee has to analyse the danger of the situation and consequence for football. When the referee takes a decision like this I am not sure he loves football."