I do not want to say anything which is easily misinterpreted, which is why I'd like a good discussion of the most common questions asked.
Anything can be easily misinterpreted. This is especially true if, as you seem to imply by your remarks, that your audience might be opposed to our beliefs.
I agree with everyone else. If you can't answer these questions yourself, you should leave it alone.
My final advice...don't do it.
If you absolutely feel you must
mention Satanism, do a speech about various religions that have come into being in recent history. In addition to the Church of Satan
, you could mention the Church of Subgenius, the new Wiccan movement, Scientology and a host of others.