1) Muslim and Arab Americans are two distinct groups that sometimes overlap, with Arabs being an ethnic group and Muslims defining a religious group.
2) Arab Americans have a population of up to 3 million people with diverse origins, while Muslim Americans number over 3 million people with a variety of ethnic backgrounds.
3) Both groups have faced increased discrimination and racial profiling after events like 9/11 due to stereotypes in media and growing Islamophobia, though they remain actively engaged in civic life.