what are some of the changes the United States has made to policies concerning treatment of muslims and arabic members of society

First, it helps a lot to put your subject in, that way the right folks look at your question, and the rest do not waste their time. Thanks.

What do you mean some of the changes the United States has made to policies... I know of no "policies" the US has on treatment of any ethnic or religious societies, in fact, it is unconstitutional to have any such policies that do not conform to the US constitution. Thelast revelent constitutional change was mid last century, during the US Civil war.
So I have no idea what you are asking.