Re: Is it still Aikido if you take away the Japanese clothes, etiquette and other things?
To the question is this aikido? I would not answer that a demonstration of technique is aikido. In the same way I don't think aikido exists outside training.
I remember seeing at an exhibition at the Bibliotheque Nationale in Paris, France, a picture from Ancient Egypt that was definitely ikkyo. How many ways are there to do an arm lock on a down coming sword? Not that many.
So aikido shares its technique with many other arts through time and space.
To come back to the initial subject, I believe that aikido without the Japanese layers would be most of the time a reflection of one's self in the mirror. We need to go out of our way to really study otherwise we end up searching for comfort and habits.
So what would be classical French fencing without "panache" and leather and all the bowing? Self satisfied technique.