"I know they aren't after me (and hence won't try to parse every sentence I say and take it out of context like you did)"
yeah good luck with that one. The police will take what you have to say and bend it against you to see where it goes. It's called probing and is a legitimate investigative technique. You prefacing the situation with your pre-amble isn't going to stop that.
"I explicitly stated "I'm not guilty" letting the cops know I'm not trying to be smug with them and that I do want them to know I'm not guilty."
They haven't said you are guilty of anything, if they are just investigating. It's that kind of behavior - denying guilt before any has been laden upon the suspect - that police zero in on.
Seriously, I think you should re-consider your position and read some other people's views, especially the ACLU. You're unintentionally pushing a load of buttons that the police will pick up on with your preamble that I don't even think you realize.