They are probably misinformed.

Gavin Andresen was invited to give a talk to the CIA about Bitcoin in 2011 as they were starting to get interested in this new thing. This was more than 2 years after genesis. Here's the official thread about it.

Of course if they are interested, just reading the first few messages from Satoshi Nakamoto, archived here for convenience, are a great starting point to try to understand how and why Bitcoin exists.

There are many other sources that clearly don't point towards the CIA/NSA/etc as the creator of Bitcoin. It's just a matter of reading the original posts/emails/source code.