I can't speak for others, but i will try to clarify what i think is the issue. The jet, a me-262 is popular amongst vintage aircraft enthusiasts. by itself it means nothing, including the symbol on the wings. Reproduction me-262's are made till this day for all to fly, and are usually made with historically accurate insignia. the iron cross is still used today by the german military and by itself is not a symbolism of nazi germany. The flag is the problem. It was pointed out to me that it is the mark of a neonazi group. I did some research, and while you wont' find that exact flag, you will find many very similair, using a combination of the same symbols. The lightning bolt in the center is most likely in reference to the nazi ss. The black swirl behind it is a variation of a reverse swatzika. The overall color scheme and shape are common themes in such flags. Neonazi's will also generally grab onto other symbols otherwise benign as part of the propoganda. If you add that to the fact that xray has been linked with racist forums in another thread, and it paints the picture. He has stated himself that he will make anything you want, including the nazi ss signs he has already made, just to make a dollar.
He may or may not be racist, but by his own admission he has no problem making racist material for money. That in itself appears to have alot to do with what is turning people away. My strongest beef with xray is his treatment of bernie, and the comments he made to the professor about his kids. Regardless of how xray feels about the professor or anyone else for that matter, there are things you just don't say.