Never heard in my life about boxing judges which would favour a Slovak boxer over USA (especially a former world champion and kinda USA poster boy.)
+ I watched the bout life on Olympic Channel, and you know, when even both their announcers (usually USA biased) called it fair call I am quite surprised to read this from you. but, Sure, ok, it is your oppinion and you are entitled to have it.
Bandi won both first 2 rounds fairly (again both OC commentators admitted it), in the last Gonzalez was clearly much much better but it came too late for him and Bandi knew after the 2 rounds he do not need to risk anymore and at the end he did the job and kept his win.
Only Gonzalez is here to blame for being extremely passive in both first rounds and underestimated Bandi, definitely not the judges, which in opposite were surprisingly pretty fair and not "fall" under the name of the favorite and stronger/more important country.