Sorry but women and African Americans are people too. We've always had new immigrants come to this country and they always raise fears that they'll change the USA. The Italians and Irish raised the same fears 150 years ago as Muslims and Hispanics do today. Change is a good thing, there'd be no evolution without it, but people are ALL fundamentally the same.^^ Actually you are dead wrong. People have changed. In addition to adding the entirety of women and African American's to the job pool we've also taken on something like 100,000 legal immigrants a year, plus another what 3million illegals.
If you don't think that adding tens of millions of people to the work force isn't a change, then idk what is...