Specifically, where and how do y'all see America as "declining," other than the OP's suggestion that the white, Anglo-Protestant, Judeo-Christian's loss of power and control constitutes decline?
Where in the hell have you been for the last 4 or more years?
5 trillion of debt on our children.
an over 8 percent unemployment rate for 4 years.
Credit rating dropped
more people on food stamps then ever.
47 percent of the population do not make enough money to pay federal income tax.
those are just some but should be more then enough to convince anyone who wishes to learn.
We've been deeper in debt as a percentage of the GDP (see: 1945), the unemployment rate has been higher (see: 1983 and the Great Depression). We survived and prospered.
But, how is temporary fluctuations in the economy "declining?"