It was more of a hype creatd by media. news channels painted the items like "Racial discrimination" OR "insult to indians".
In current context of increased terrorist incidents we should must learn first to behave ourselves and act as per code of conduct in flight and remain disciplined , otherwise it is quite natural to be under suspicion.
Fact is that that Marshals got suspicious, raised the alarm , inquiered thoroughly and finally when they found innocent they were released .what can be more fair than this ?