One can defile a sacrament.  

The Eucharist is defiled by, in effect, spitting on it.  That's what happens when a person who is in mortal sin defiantly and without repentance for the mortal sin takes the Eucharist.  

You reject this because you reject what Jesus said regarding divorce and adultery.  Whether there may be actions that defile the Eucharist even more than receiving the host in defiant mortal sin is not the question.