What should I do if I come to a Musjid in America knowing about the Qiblah controversy?

Answer

Whenever and wherever you find a Musjid, perform your Salaat there facing the direction which the Mihraab indicates. Don't probe the direction. Don't ask if it is north-east or south-east. Simply follow the direction which the Musjid's Mihraab indicates. That is the Sunnah way. Don't create a problem by prying into something unnecessarily.