LOL! So, the Catholics mustn't share their faith? I've never seen an evangelical excuse himself when he thought he had something important to add to a Catholic Bible study (and yes, I am witness to such). I would think that a Bible study, of all places, would be an appropriate place to defend biblical notions. If they want to start their meeting with an unbiblical mandate, it should be discussed...
Sorry, I thought a mandate had been established.