This is some high-order recursive stupidity
Too stupid to understand encryption: well, that's OK, the details are generally fiddly and need the sort of education you don't have if you have a history degree.
Too stupid to realise she doesn't understand encryption & should ask someone who does. This is bad.
Too stupid to realise that *standing up and announcing the previous two things in public is not a good idea*. This is really quite a special level of stupid.
Too stupid to realise that accusing people who *do* understand it of 'sneering' and 'patronising' you is not going to help any.
We are ruled by stupids.