Tom, I'd go back and politely ask for my money. If polite didn't work really well I might get a little louder so some customers could hear me, but I would not get nasty. I would also call the county prosecutor's office or state AG office PRIOR to my visit to get a bit of information. Most every state has laws that allow you to back out of a car sale during a certain period of time for any reason at all, and as you are backing out before taking delivery I'd suggest that you are well within the time period to back out since many states allow you to back out after taking possession!
Some dealers play all sorts of games, I buy a lot of vehicles each year for our company, there are dealers that we simply refuse to deal with because of the games they attempt to play. Heck I just got fed up with a Lexus dealer and would not even consider buying one of those cars, not because of the vehicle, because they are excellent vehicles, but simply because of the attitude of the dealership. They wouldn't bring me a car to test drive, they wouldn't configure it the way I wanted (but another dealer would), they wouldn't quote me a price outright, they constantly (EVERY converstaion I had with them) reminded me that buying their vehicle was a complex experience, I finally got fed up and asked the sales manager what was so complex about me paying cash for a car? He said there was more to it. I asked What? He stammered. I said, hey, if you have it and I like it and I pay for it how is that complex? It took 5 or 6 converstations to get to that point and despite the fact that my initials are "BS" I can tell you when a dealer is feeding me a line of BS!!! We have another dealer across the street from my office, I used to buy several cars a year from them for the sales department. They were a 5 Star dealership that sold to a new owner. Now you walk in and they give you a balloon, popcorn and the music is so loud that you can't hear. I turned around to walk out and got in my car, 5 sales people (honestly 5 of them) got around my car and one guy leaned in my open window. I thought I was going to have to run them down to get out of the lot! Needless to say, I don't buy vehicles from them anymore. I called another dealer, they faxed me a window sticker, quoted me a great price, and I bought the car over the phone. They played no games. I've done that a few times with that dealer now and each time has been a pleasure to deal with. I suspect your Honda dealer is one of the games players.
Go back and get your money, they will very likely say that the $1500 can't be refunded but can be applied to any other car on the lot or they may pull some other junk just like that. That is why I would call the AG's office before going into the dealership! You might also want to open a case with your BBB and file a complaint with the Chamber of Commerce too. But do all that before you walk in the door based on the non-emotional facts as they have occurred.