Americans are against socialism because black people might benefit. But they love the socialist pledge of allegiance.

In the USA people are not educated very well. Most Americans are educated via a populous method meaning that the priorities are high school football and social activities rather than real academics. The reality is that Americans have no idea what "socialism" really is. they think it is pure communism and have been taught that it is "anti-American". The conservatives have had some success using religion, propaganda news sources to brainwash a vast number of Americans to believe that socialism, communism, and Liberal, are all the same thing AND that they are illegal. Nothing could be farther than the truth.
There are facets of socialism that would benefit the USA immensely, but basically, our form of government is intended to be a free and fair capitalist system. We are by definition a constitutional representative democracy. That being said the markets dictate most of the American society, but there is a greater responsibility included in the U.S. Constitution to provide equal opportunity for all.

The Preamble states:
"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."

Conservatives ignore the part that states " promote the general Welfare" as to them welfare is communist as well.
The vast majority of Americans have no idea what the Constitution states or means. Conservatives constantly mix up the Declaration and the Constitution. They don't even know what the 2nd Amendment is. They choose to invoke the 10th Amendment (not knowing what it really says) and ignore the rest.
The 10th Amendment:
"The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people."
For some reason conservatives thinks this is justification for states rights. It does not mean that at all. It simply means the states can pass and enforce laws that the federal government does not reserve for itself, but those laws MUST comply with the federal government and the Constitution.
Also, most Americans don't know or understand 'The Federalist Papers' which are the very definition of the Constitution.
It is so amusing that conservatives are so against "federalism" when the authors of the constitution were ALL Federalist, and the very definition of the meaning and intention of the Constitution is found in a document named 'The Federalist Papers'.
Also, most Americans don't understand that the Constitution is a living document. So-called because it is a contract that is subject to modification and change by a procedure. So conservatives like to cherry-pck the constitution and demand that it be taken literally unless it doesn't suit them. They would like to obey archaic laws and take this nation back to a time of white male protestant rule.