An Odd Thing About Mozart

I've listened to classical music most of my life and a considerable amount of that has been Mozart.  For years I've been able to listen to Mozart and discern when he's being dark and when he's being more playful or lighthearted.  Yesterday, however, is the first time I've listened to a choral work of his and heard...sarcasm??? Mockery???

This was very surprising to me and made me wonder if my interpretation of the music I hear is more in tune with my mood or if the music tunes my mood.  Sarcasm is not something I've ever really heard in choral works.  Specifically, the Kyrie and Laudamus Te portions were almost mocking in their tone and movement.  I don't know if it was intended and if so who was being mocked: the church, god, his sponsor?  It was almost as if Mozart was saying, "I'm writing this because you want it but I'm so much better than this."  Even that isn't quite what I heard.

Anyone ever hear this in other classical works?  It's a curious thing and now I'm going to be on the lookout for more of it.