[ashbee]

Is it possible you've taken more from that single word than was intended?

GP said "insane to me". I understood this as a colloquial expression of disbelief or surprise rather than an actual accusation of insanity.

E.g. I might say it's insane to me that anyone likes Brussels sprouts. The state of mind of someone who could hold such a position is so alien to me as to be comparable to insanity.