How should the U.S handel Immigration?

The U.S Goverment should leave them alone & welcome them over to our country. I feel like they are regular humans & they should be treated like any one else in America. Immigrants can actually do "The U.S" some good they can bring pizes, gifts, there traditions, foods, there is all type of things. Immigrants are just trying to live a free regular life there shouldn't be a problem as long as they follow the rules of the land & not commiting any crimes.