they shared the language through the roseta stone
African-Americans are Americans of African ancestry. "American" is a nationality and not a race. Egyptians are not any kind of Americans. They are Egyptians. Egyptian is also a nationality.
polytheism
Egyptians are people from Egypt. The people of Egypt are called "Egyptians" as we, the people who live in America, are called Americans.
Sure. Egypt is an Arab country. Prior to 600 CE, Egyptians spoke Byzantine Greek and wrote with Greek letters. Ancient Egypt used hieroglyphics and several local alphabets (such as Demotic).
yes
Sacrificing to their gods.
Americans tend to eat more burgers
ancient Egyptians, the pharaoh (being mummified, now dead), and the gods
they are attached to their culture
There are no alphabets in any numbers. alphabets contain only letters (not numbers).
No
It depends on which alphabets you're comparing.