Well done! It's always nice to hear about ignorance retreating a little further, and people realising that their deepest beliefs are not threatened by a pack of cards.
I didn't give a speech, but I had the same effect on a friend who is a religious Jew and who had the impression the tarot was "black magic". I showed her some cards and we talked about them, and about what tarot can and can't do. She was very interested - particularly in the idea of tarot showing a different point of view, and mirroring our lives, and so helping overcome blocks or be aware about certain energies acting in our lives.