Nah, the anti-Mexico people are on the fringe. Most of the issue is with cars not being made in Munich, coming from the purist crowd. Brazil is equally as bad.
It raises an interesting point - what is BMW's flagship model??? For example, Porsche builds all 911 models in Stuttgart but offloads production of boxster/caymans, panameras, and cayennes to other countries. Does this mean that only 5ers and above are the models BMW considers their best? Maybe at one time the 5er and 7er were killing it, but most would prefer an A6 or an S-Class these days.