Evidently they are rich and only in the business for fun!! In the real world machine shops have to work on just about anything that comes thru the door. Just to keep them open.. Maybe you are a little too sensitive about some ribbing !
I always tease the Ford guys about dumping all that money in their motors. Always call Olds engines Olds-mo-piles just to tease a few Olds fanatics. But then the Chevy guys hear "Hell it's just an old Shiver-lay".. Buicks are "BU-hogs".. Internationals are "Binders" etc.
I own (or have owned) at least one of each. All have good points and bad. One of our best customers was a Hundae/Honda guy!!