Am I supposed to be insulted?

I was talking to one guy who has been working in the office and is now at the rig. I forget now what we were talking about but at one point he said: "Oh! this is why you are so........ principled", with "principled" said in a disgusted way.

I guess it is an insult now.
Either way, I just said ignored it and continued the conversation.

What ever the reason why he thought I was so "principled" I forget, but yes, let's face it I AM "principled"...is it even a proper adjective? I don't actually know.