1) Muslim and Arab Americans are diverse minority groups that overlap, but are distinct - Arabs are an ethnic group and Muslims define a religious group, so one cannot assume an Arab is necessarily Muslim.
2) Arab Americans have a population of up to 3 million with origins in various Middle Eastern countries, exhibiting diversity in arrival times, origins, and religious traditions.
3) Muslim Americans number over 3 million and are growing through immigration and conversion, with origins across Africa, Asia, and the Arab world. They strive to balance religious and cultural identities with their status as American residents.