How the people from the Middle East are treated in the US?

It is less a matter of national origin than it is a matter of economic and educational class and English fluency. Other things being equal, those from the Middle East who look, act, and dress like Americans are treated like Americans. Those who dress in uncommon national costumes are usually treated either with exaggerated politeness or with distancing, depending on the upbringing and good manners of the American involved in the interaction.