That was your mistake. If you had insisted, the man would have admired your chutzpah and met you. And given you the secret Chtulhu slaying weapon they had been developing that would have killed the Great Old One forever.
There was also the anti-insantity utility belt that goes along with that, which ensures your sanity stays at 99, even if you cast all the mythos spells imbedded into the belt.